{"id":24267,"date":"2026-06-01T12:50:47","date_gmt":"2026-06-01T16:50:47","guid":{"rendered":"https:\/\/blog.archivalmethods.com\/?p=24267"},"modified":"2026-06-01T13:21:45","modified_gmt":"2026-06-01T17:21:45","slug":"how-to-store-and-preserve-negatives","status":"publish","type":"post","link":"https:\/\/blog.archivalmethods.com\/how-to-store-and-preserve-negatives\/","title":{"rendered":"How to Store and Preserve Negatives"},"content":{"rendered":"\n<p>Negatives are one of the less stable materials in an archive. Two of the once dominant plastic supports used to make negatives (cellulose nitrate and cellulose acetate) are <a href=\"https:\/\/dictionary.archivists.org\/entry\/autocatalytic.html\" target=\"_blank\" rel=\"noreferrer noopener\">autocatalytic<\/a>. Moisture, acids, and heat are catalysts for deterioration. Then, as the film begins to break down, it emits gases that accelerate its own decay. To slow down the deterioration of nitrate and acetate films you need to control its environment.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.culturalheritage.org\/home\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"1000\" height=\"753\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Damaged-4x5-negative.jpg\" alt=\"Example of a very deteriorated black &amp; white 4 x 5 negative.\" class=\"wp-image-24327 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Damaged-4x5-negative.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Damaged-4x5-negative-600x452.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Damaged-4x5-negative-768x578.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/753;\" \/><\/a><figcaption class=\"wp-element-caption\">Example of a very deteriorated black &amp; white 4 x 5 negative. I found it stored in an old Kodak film box. There is no detectable odor. A <a href=\"https:\/\/www.culturalheritage.org\/home\" target=\"_blank\" rel=\"noreferrer noopener\">conservator<\/a> could probably salvage the image by removing the gelatin image from the plastic base.<\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"#quick-tips\">Quick Tips<\/a><\/li>\n\n\n\n<li><a href=\"#negative-types\">Types of Negatives<\/a><\/li>\n\n\n\n<li><a href=\"#glass-plates\">Glass Plates<\/a><\/li>\n\n\n\n<li><a href=\"#cellulose-nitrate\">Cellulose Nitrate<\/a><\/li>\n\n\n\n<li><a href=\"#cellulose-acetate\">Cellulose Acetate<\/a><\/li>\n\n\n\n<li><a href=\"#polyester\">Polyester<\/a><\/li>\n\n\n\n<li><a href=\"#film-formats\">Film Formats<\/a><\/li>\n\n\n\n<li><a href=\"#storage-options\">Storage Option<\/a><a href=\"http:\/\/storage-options\">s<\/a><\/li>\n\n\n\n<li><a href=\"#plastic-free\" type=\"internal\" id=\"#plastic-free\">Plastic-Free Storage Solutions<\/a><\/li>\n\n\n\n<li><a href=\"#resources\">Resources<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"quick-tips\">TLDR: Some Quick Tips<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hi-Res Scans<\/strong> &#8211; consider making hi-res scans of your negatives (DIY or hire a professional) before storing them. You&#8217;ll have a high-quality back-up, you can share the digital files, and you can make prints from them.<\/li>\n\n\n\n<li><strong>Wear Gloves<\/strong> &#8211; when handling your negatives wear <a href=\"https:\/\/www.archivalmethods.com\/product\/black-nitrile-gloves\" target=\"_blank\" rel=\"noreferrer noopener\">powder-free nitrile gloves<\/a> or <a href=\"https:\/\/www.archivalmethods.com\/product\/white-cotton-inspection-gloves\" target=\"_blank\" rel=\"noreferrer noopener\">cotton gloves<\/a> to protect the film and also to protect you. Sometimes wearing gloves can make handling difficult and even increase your risk of damaging your collection. We recommend wearing gloves but if you decide not to, make sure your hands are clean, dry, and free of any lotions, and only touch the negatives on the edges.<\/li>\n\n\n\n<li><strong>Environment<\/strong> &#8211; cool &#8211; at or below 70 F \/ 21 C (the colder the better) and between 20 to 50% humidity (the closer to 20% the better but not below 20%) is desired. No attics or basements. Store out of direct light.<\/li>\n\n\n\n<li><strong>Separation<\/strong> &#8211; when films are off-gassing they can harm other films in their vicinity. You should isolate the decomposing films, if possible. <\/li>\n\n\n\n<li><strong>Boxes<\/strong> &#8211; use acid-free, lignin-free, and buffered boxes. Buffering will help neutralize acids in the environment. Do not use an airtight container (such as a plastic tote) because it can trap gasses.<\/li>\n\n\n\n<li><strong>Enclosures<\/strong> &#8211; use acid-free <a href=\"https:\/\/www.archivalmethods.com\/product\/open-end-envelopes\">Open End Envelopes<\/a> or <a href=\"https:\/\/www.archivalmethods.com\/product\/negative-file-folders?zCountry=US\" target=\"_blank\" rel=\"noreferrer noopener\">Negative File Folders<\/a> for storing large format, medium format, and 35mm negatives<\/li>\n\n\n\n<li><strong>Sleeves<\/strong> &#8211; when using sleeves use plastic that passed the PAT. Polyester <a href=\"https:\/\/www.archivalmethods.com\/product\/side-lock-film-sleeves?zCountry=US\" target=\"_blank\" rel=\"noreferrer noopener\">Side Lock Film Sleeves<\/a> or <a href=\"https:\/\/www.archivalmethods.com\/product\/film-interleaving-folder?zCountry=US\" target=\"_blank\" rel=\"noreferrer noopener\">Interleaving Folders<\/a> are the clearest and most inert. Polypropylene and <a href=\"https:\/\/www.archivalmethods.com\/product\/hd-poly-envelopes?zCountry=US\" target=\"_blank\" rel=\"noreferrer noopener\">HD Poly Envelopes<\/a> are good, less expensive alternatives. Plastic sleeves protect the film during handling and when inserting into envelopes. If you want to avoid plastic (as recommended by some conservators) but still want to store multiple negatives in one envelope, you can make your own archival paper sleeves by folding paper in half.<\/li>\n\n\n\n<li><strong>Kits<\/strong> &#8211; See our <a href=\"https:\/\/www.archivalmethods.com\/product\/film-storage-systems?zCountry=US\" target=\"_blank\" rel=\"noreferrer noopener\">Film Storage Kits<\/a> for all-in-one solutions.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"negative-types\">Types of Negatives<\/h2>\n\n\n\n<p>There are many types of negatives and films. Still photography included glass plate negatives and paper negatives before plastic negatives dominated the field. Films for still photography and moving images come in color and black and white, and an array of sizes and formats. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"glass-plates\">Glass Plates<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/film-interleaving-folder?zCountry=US\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"998\" height=\"602\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Glass-neg-polyester-folder-BLOG.jpg\" alt=\"4 x 5 vintage glass negative with a polyester Film Interleaving Folder and acid-free Open End Envelope\" class=\"wp-image-24353 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Glass-neg-polyester-folder-BLOG.jpg 998w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Glass-neg-polyester-folder-BLOG-600x362.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Glass-neg-polyester-folder-BLOG-768x463.jpg 768w\" data-sizes=\"(max-width: 998px) 100vw, 998px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 998px; --smush-placeholder-aspect-ratio: 998\/602;\" \/><\/a><figcaption class=\"wp-element-caption\">4 x 5 vintage glass negative with a polyester Film Interleaving Folder and acid-free Open End Envelope<\/figcaption><\/figure>\n\n\n\n<p>Negatives on glass supports include wet-plate and dry plate collodion in the 1800s which were then largely replaced by silver gelatin plates. There were also glass lantern slides that would fit into the 4 x 5 envelopes. Glass is fragile and it&#8217;s also heavy. Common glass plate sizes were 4 x 5, 5 x 7, and 8 x 10. When inserting a negative into an envelope, be careful not to scratch the emulsion when you slide it in. Using a plastic or paper folder can help avoid this.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/film-storage-systems?zCountry=US\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"1000\" height=\"753\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/02-003-box-4x5-negs-archival-methods.jpg\" alt=\"The 4 x 5 Film Storage Kit plus some Acid-free Foamboard (not part of the kit) used as cushioning between the glass negatives. \" class=\"wp-image-24350 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/02-003-box-4x5-negs-archival-methods.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/02-003-box-4x5-negs-archival-methods-600x452.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/02-003-box-4x5-negs-archival-methods-768x578.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/753;\" \/><\/a><figcaption class=\"wp-element-caption\">The 4 x 5 Film Storage Kit plus some Acid-free Foamboard (not part of the kit) used as cushioning between the glass negatives. Using this method you might fit forty to fifty glass negatives into this box (#02-003).<\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">How to Store Glass Plate Negatives<\/h4>\n\n\n\n<p>Store the plates vertically on their long sides. If your box isn&#8217;t full you will need to use something to keep the negatives upright. Options include <a href=\"https:\/\/www.archivalmethods.com\/product\/photo-box-spacers\">Photo Box Spacers<\/a> or crumpled up <a href=\"https:\/\/www.archivalmethods.com\/product\/archival-tissue\" target=\"_blank\" rel=\"noreferrer noopener\">Archival Tissue<\/a>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.archivalmethods.com\/product\/open-end-envelopes\" target=\"_blank\" rel=\"noreferrer noopener\">Open-End Envelopes<\/a>\n<ul class=\"wp-block-list\">\n<li>acid-free, lignin-free paper will not harm negatives<\/li>\n\n\n\n<li>buffered to combat acids<\/li>\n\n\n\n<li>you can write important information on the envelopes (before inserting negative)<\/li>\n\n\n\n<li>paper allows gasses to escape and also absorbs acids<\/li>\n\n\n\n<li>stiffness of paper offers better support than plastic<\/li>\n\n\n\n<li>use with interleaving folders to avoid scratching your film<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><a href=\"https:\/\/www.archivalmethods.com\/product\/film-interleaving-folder?zCountry=US\" target=\"_blank\" rel=\"noreferrer noopener\">Film Interleaving Folders<\/a>\n<ul class=\"wp-block-list\">\n<li>easy open flap design; meant to be used with envelopes<\/li>\n\n\n\n<li>helps prevent scratching when inserting negs into envelopes<\/li>\n\n\n\n<li>protects neg from finger prints when handling<\/li>\n\n\n\n<li>polyester is very clear and inert<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Archival Paper Interleaving Folders (DIY)\n<ul class=\"wp-block-list\">\n<li>our <a href=\"https:\/\/www.archivalmethods.com\/product\/permalife-20-lb-bond-paper\" target=\"_blank\" rel=\"noreferrer noopener\">Permalife Bond Paper<\/a> is a good choice &#8211; it is buffered and a good weight <\/li>\n\n\n\n<li>an alternative to the plastic ones<\/li>\n\n\n\n<li>before inserting negative you can write info on it and store several together in one envelope<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><a href=\"https:\/\/www.archivalmethods.com\/product\/acid-free-foamboard\" target=\"_blank\" rel=\"noreferrer noopener\">Acid-free Foamboard<\/a>\n<ul class=\"wp-block-list\">\n<li>to use as spacers between each envelope to cushion the plates<\/li>\n\n\n\n<li>very light, will not add noticeable weight<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><a href=\"https:\/\/www.archivalmethods.com\/product\/hinged-lid-boxes\" target=\"_blank\" rel=\"noreferrer noopener\">Hinged Lid Boxes<\/a>\n<ul class=\"wp-block-list\">\n<li>02-003 can store 4 x 5 envelopes<\/li>\n\n\n\n<li>02-005 and 02-004 will accommodate 5 x 7 envelopes<\/li>\n\n\n\n<li>02-009 will accommodate 8 x 10 envelopes <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/open-end-envelopes?zCountry=US\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"1000\" height=\"638\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Glass-neg-paper-sleeve-BLOG.jpg\" alt=\"4 x 5 glass negative in a Permalife folder that will be inserted into an Open End Envelope for safe storage\" class=\"wp-image-24356 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Glass-neg-paper-sleeve-BLOG.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Glass-neg-paper-sleeve-BLOG-600x383.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Glass-neg-paper-sleeve-BLOG-768x490.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/638;\" \/><\/a><figcaption class=\"wp-element-caption\">4 x 5 glass negative in a folder made from our Permalife Bond Paper (#132-410) that will be inserted into an Open End Envelope for safe storage<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"cellulose-nitrate\">Cellulose Nitrate<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.nfsa.gov.au\/preservation\/glossary\/n?id=node-3761\" target=\"_blank\" rel=\"noreferrer noopener\">Cellulose nitrate<\/a> was the first man-made polymer and was developed in the 1850s. In 1889 Kodak began marketing it as motion picture film and roll film. By 1950 it had been phased out and replaced by cellulose acetate films. Nitrate is highly flammable and once burning is very difficult to extinguish. A nitrate fire also generates toxic nitric acid fumes. If you have nitrate in your collection <a href=\"https:\/\/www.amianet.org\/wp-content\/uploads\/Resource-Nitrate-Identifying-and-Handling.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">take precautions<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"808\" height=\"565\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Nitrate-film-dates.jpg\" alt=\"\" class=\"wp-image-24704 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Nitrate-film-dates.jpg 808w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Nitrate-film-dates-600x420.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Nitrate-film-dates-768x537.jpg 768w\" data-sizes=\"(max-width: 808px) 100vw, 808px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 808px; --smush-placeholder-aspect-ratio: 808\/565;\" \/><figcaption class=\"wp-element-caption\">Chart showing dates when Kodak stopped using nitrate for various film types<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"cellulose-acetate\">Cellulose Acetate<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.nfsa.gov.au\/preservation\/glossary\/a?id=node-3771\" target=\"_blank\" rel=\"noreferrer noopener\">Cellulose acetate<\/a> began replacing nitrate in the 1920s. It is called &#8220;safety film&#8221; because it is not flammable like nitrate film. As mentioned earlier, cellulose acetate is also autocatalytic. When it starts to break down it releases free acetic acid which is why it smells like vinegar and why this deterioration is called &#8220;vinegar syndrome.&#8221;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1000\" height=\"601\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Kodak-Safety-Film-Edge-Code-BLOG.jpg\" alt=\"Close up view of 8 x 10 negative showing the words Kodak - Safety and notch codes on the edge\" class=\"wp-image-24403 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Kodak-Safety-Film-Edge-Code-BLOG.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Kodak-Safety-Film-Edge-Code-BLOG-600x361.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Kodak-Safety-Film-Edge-Code-BLOG-768x462.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/601;\" \/><figcaption class=\"wp-element-caption\">If your film says Safety on it it is cellulose acetate (unless someone made a copy neg using nitrate film). I looked up edge notch codes and found that the four v-shaped notches indicate that it is portrait panchromatic film.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1060\" height=\"1500\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Kodak-Film-Notch-Codes-1060x1500.jpg\" alt=\"\" class=\"wp-image-24707 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Kodak-Film-Notch-Codes-1060x1500.jpg 1060w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Kodak-Film-Notch-Codes-424x600.jpg 424w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Kodak-Film-Notch-Codes-768x1087.jpg 768w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Kodak-Film-Notch-Codes.jpg 1080w\" data-sizes=\"(max-width: 1060px) 100vw, 1060px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1060px; --smush-placeholder-aspect-ratio: 1060\/1500;\" \/><figcaption class=\"wp-element-caption\">Kodak notch codes for sheet film<\/figcaption><\/figure>\n\n\n\n<p>Small gauge movie films like 8mm, Super-8, and 16mm were marketed for home use and were not made on nitrate film stock. But, it&#8217;s likely you have nitrate still film in your collection if you have negatives pre-dating 1950. If your film says SAFETY along the edge then it is cellulose acetate. But if there&#8217;s no writing on the edge, no <a href=\"https:\/\/en.wikipedia.org\/wiki\/Notch_code\" target=\"_blank\" rel=\"noreferrer noopener\">notch codes<\/a>, and no odor, it can be very hard to tell the difference between cellulose nitrate and cellulose acetate.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>&#8220;Environmental controls are essential for the preservation of film-based negatives. It is clear that typical ambient conditions (that is, approximately 40% RH and 70 F) are not adequate for the preservation of nitrate and acetate material. Of particular importance is the fact that once deterioration of a collection of negatives begins, it gains momentum rapidly, leading to the swift destruction of artifacts and increased health and safety risks.&#8221; &#8211; Paul Messier, 1993 from <a href=\"https:\/\/web.archive.org\/web\/20070610164528\/http:\/\/www.bodley.ox.ac.uk\/dept\/preservation\/information\/photographic\/messier\/messier.htm\" target=\"_blank\" rel=\"noreferrer noopener\">Preserving Your Collection of Film-Based Photographic Negatives<\/a><\/p>\n<\/blockquote>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1000\" height=\"753\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Polyester-film-on-core.jpg\" alt=\"A roll of polyester film on a spool to illustrate how it looks backlit\" class=\"wp-image-24601 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Polyester-film-on-core.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Polyester-film-on-core-600x452.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Polyester-film-on-core-768x578.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/753;\" \/><figcaption class=\"wp-element-caption\">Here is a film trailer on a core. When backlit you can see light through a spool of polyester film like this, but not through acetate. But with still film you need a cross polarized viewer to see if it is polyester or not.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"polyester\">Polyester<\/h3>\n\n\n\n<p>Polyester was introduced as a film base in the 1950s and it is far superior when it comes to strength, longevity, and archivalness. It does not self-destruct and break down like nitrate and acetate do. Cellulose acetate and polyester are both currently being used as film bases. You can find <a href=\"https:\/\/cool.culturalheritage.org\/byauth\/fischer\/fischer1.html\" target=\"_blank\" rel=\"noreferrer noopener\">instructions on how to make a cross-polarized viewer<\/a> which may help you determine if your film is polyester or not.<\/p>\n\n\n\n<p>Kodak&#8217;s brand name for its polyester film is ESTAR. From what I found online (from <a href=\"https:\/\/www.reddit.com\/r\/AnalogCommunity\/comments\/1g8twrn\/which_films_have_an_estar_base\/\" target=\"_blank\" rel=\"noreferrer noopener\">Reddit<\/a> around 2024) regarding still film, some of their color films are on polyester and some are on acetate, while the B&amp;W still films are on acetate. It is my understanding (and I may be wrong) that all of Kodak&#8217;s motion picture films are now made with a polyester base. Reach out to <a href=\"https:\/\/www.kodak.com\/en\/still-film\/products\/professional\/\" target=\"_blank\" rel=\"noreferrer noopener\">Kodak<\/a> directly for the most accurate and up-to-date information.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1000\" height=\"582\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Different-film-formats-BLOG.jpg\" alt=\"A variety of film formats on plastic supports from 35mm to 8 x 10 negatives\" class=\"wp-image-24401 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Different-film-formats-BLOG.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Different-film-formats-BLOG-600x349.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Different-film-formats-BLOG-768x447.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/582;\" \/><\/figure>\n\n\n\n<p>The above image shows a variety of film formats on plastic supports. The 8 x 10 says &#8220;Kodak &#8211; Safety&#8221; on the edge so we know that it is acetate. The 4 x 5 and old medium format (large roll film negatives) don&#8217;t have any indication of what type of film they are but they are probably nitrate. The other three are from the early 2000s and they are likely acetate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"film-formats\">Film Formats<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">35mm and Medium Format<\/h3>\n\n\n\n<p>35mm film is usually cut into strips of between 4 and 6 frames. Old medium format negatives are usually found cut into individual frames. Photographers using medium format film now usually store them in strips. Our <a href=\"https:\/\/www.archivalmethods.com\/product\/film-storage-systems\" target=\"_blank\" rel=\"noreferrer noopener\">Film Storage Kit<\/a> uses our <a href=\"https:\/\/www.archivalmethods.com\/product\/hinged-lid-boxes\" target=\"_blank\" rel=\"noreferrer noopener\">Hinged Lid Box<\/a> 02-003 in conjunction with <a href=\"https:\/\/www.archivalmethods.com\/product\/negative-file-folders\">Negative File Folders<\/a> and <a href=\"https:\/\/www.archivalmethods.com\/product\/side-lock-film-sleeves\" target=\"_blank\" rel=\"noreferrer noopener\">Side Lock Film Sleeves<\/a>. <\/p>\n\n\n\n<p>If you have early medium format negs cut into single frames (and often in a variety of sizes) I&#8217;ll cover that later in this post. Or, you can go directly to <a href=\"https:\/\/www.archivalmethods.com\/blog\/how-to-store-old-family-negatives\/\" target=\"_blank\" rel=\"noreferrer noopener\">How to Store Old Family Negatives<\/a>, a post that focuses on this style negative.<\/p>\n\n\n\n<p>A popular method of storing strips of film negatives is to use archival binder pages. This method is helpful for making contact prints. We offer a lot of <a href=\"https:\/\/www.archivalmethods.com\/product\/print-and-slide-pages\" target=\"_blank\" rel=\"noreferrer noopener\">binder pages for photos and one for 35mm mounted slides<\/a>, but we do not carry binder pages for film. I believe this decision was made because you need to slide film strips into narrow channels and this increases the risk of scratching or even denting the film. High density polyethylene is the best choice for this style storage because it is a soft material and is static-free so it is very unlikely to scratch your negatives. <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/film-storage-systems\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"1000\" height=\"753\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/30-1101-Film-storage-kit-4x5-02-edit-archival-methods.jpg\" alt=\"4 x 5 Film Storage Kit includes a Hinged Lid Box, polyester Film Interleaving Folders, and Open End Envelopes. \" class=\"wp-image-24603 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/30-1101-Film-storage-kit-4x5-02-edit-archival-methods.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/30-1101-Film-storage-kit-4x5-02-edit-archival-methods-600x452.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/30-1101-Film-storage-kit-4x5-02-edit-archival-methods-768x578.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/753;\" \/><\/a><figcaption class=\"wp-element-caption\">4 x 5 Film Storage Kit (30-1101) includes a Hinged Lid Box, polyester Film Interleaving Folders, and Open End Envelopes. <\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Large Format Film<\/h3>\n\n\n\n<p>Common large format sizes are 4 x 5, 5 x 7, and 8 x 10 but they can go up even larger. The <a href=\"https:\/\/www.archivalmethods.com\/product\/film-storage-systems\" target=\"_blank\" rel=\"noreferrer noopener\">4 x 5 Film Storage Kit<\/a> includes a <a href=\"https:\/\/www.archivalmethods.com\/product\/hinged-lid-boxes?zCountry=US\" target=\"_blank\" rel=\"noreferrer noopener\">hinged lid box<\/a> (02-003), polyester <a href=\"https:\/\/www.archivalmethods.com\/product\/film-interleaving-folder?zCountry=US\" target=\"_blank\" rel=\"noreferrer noopener\">film interleaving folders<\/a> (30-101), and <a href=\"https:\/\/www.archivalmethods.com\/product\/open-end-envelopes\" target=\"_blank\" rel=\"noreferrer noopener\">open-end envelopes<\/a> (20-001). Or you could buy the <a href=\"https:\/\/www.archivalmethods.com\/product\/hinged-lid-boxes?zCountry=US\" type=\"link\" id=\"https:\/\/www.archivalmethods.com\/product\/hinged-lid-boxes?zCountry=US\" target=\"_blank\" rel=\"noreferrer noopener\">box<\/a> and <a href=\"https:\/\/www.archivalmethods.com\/product\/open-end-envelopes?zCountry=US\" target=\"_blank\" rel=\"noreferrer noopener\">envelopes<\/a> a la carte if you prefer not to use the polyester sleeves.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"storage-options\">Storage Options<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Metal Edge Boxes<\/h3>\n\n\n\n<p>Our <a href=\"https:\/\/www.archivalmethods.com\/category\/metal-edge-boxes\" target=\"_blank\" rel=\"noreferrer noopener\">Metal Edge Boxes<\/a> come in several colors and styles and we make them here in <a href=\"https:\/\/en.wikipedia.org\/wiki\/Rochester,_New_York\" target=\"_blank\" rel=\"noreferrer noopener\">Rochester, NY<\/a>. They are all acid-free, lignin-free, and buffered. The metal edges and high quality box board make these very sturdy so you can stack several of them safely.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/drop-front-boxes-1-1-2-inch?zCountry=US\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"1000\" height=\"443\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/8x10-negs-interleaving-drop-front-BLOG.jpg\" alt=\"Vintage 8 x 10 safety negatives stored inside a 1-1\/2&quot; Drop Front Box with archival paper interleaving between the negatives\" class=\"wp-image-24417 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/8x10-negs-interleaving-drop-front-BLOG.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/8x10-negs-interleaving-drop-front-BLOG-600x266.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/8x10-negs-interleaving-drop-front-BLOG-768x340.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/443;\" \/><\/a><figcaption class=\"wp-element-caption\">8 x 10 negatives stored inside our 8 x 10 1-1\/2&#8243; Drop Front Box (#01-011)<\/figcaption><\/figure>\n\n\n\n<p>I used our 8 x 10 1-1\/2&#8243; Drop Front Box (#01-011) to store these 8 x 10 negatives. The negatives are at least 75 years old and one of them (not pictured) started to warp after I had them stored in plastic sleeves for about two years. I decided to remove them from the sleeves and interleave them with <a href=\"https:\/\/www.archivalmethods.com\/product\/permalife-20-lb-bond-paper\" target=\"_blank\" rel=\"noreferrer noopener\">Permalife Bond Paper<\/a>. I am also separating out the warped negative from these better ones. I used the smallest <a href=\"https:\/\/www.archivalmethods.com\/product\/adhesive-back-vinyl-label\" target=\"_blank\" rel=\"noreferrer noopener\">Adhesive Back Vinyl Label Holder<\/a> (37-695) to label the outside of the box.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.archivalmethods.com\/product\/drop-front-boxes-1-1-2-inch\" target=\"_blank\" rel=\"noreferrer noopener\">1-1\/2&#8243; Drop Front Boxes<\/a> &#8211; if you have 8 x 10 or larger negatives, you could store them flat inside one of these boxes. The drop front design makes it easy to remove items without damaging them.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.archivalmethods.com\/product\/hinged-lid-boxes\" target=\"_blank\" rel=\"noreferrer noopener\">Hinged Lid Boxes<\/a> &#8211; several of our hinged lid boxes are good for storing negatives upright. \n<ul class=\"wp-block-list\">\n<li>02-003 can store 35mm, medium format, and 4 x 5 film inside paper enclosures (see <a href=\"https:\/\/www.archivalmethods.com\/product\/film-storage-systems\" target=\"_blank\" rel=\"noreferrer noopener\">Film Storage Kits<\/a>)<\/li>\n\n\n\n<li>02-005 and 02-004 will accommodate 5 x 7 open end envelopes<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/hinged-lid-boxes?zCountry=US\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"1000\" height=\"753\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/35mm-permalife-folders-in-box-archival-methods.jpg\" alt=\"Hinged Lid Box with file folders for storing strips of negatives\" class=\"wp-image-24389 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/35mm-permalife-folders-in-box-archival-methods.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/35mm-permalife-folders-in-box-archival-methods-600x452.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/35mm-permalife-folders-in-box-archival-methods-768x578.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/753;\" \/><\/a><figcaption class=\"wp-element-caption\">Hinged Lid Box #02-003 is great for storing and organizing strips of 35mm and medium format film inside our Negative File Folders. There&#8217;s space to write extensive notes, if desired. Pencil is good because it can be erased if you make a mistake or want to re-use it, but archival pen stands out more.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Enclosure &amp; Sleeves<\/h3>\n\n\n\n<p>Our <a href=\"https:\/\/www.archivalmethods.com\/category\/enclosures?zCountry=US\" target=\"_blank\" rel=\"noreferrer noopener\">Enclosures and Sleeves<\/a> are safe, archival quality that pass the PAT. On every product page there is a tab called Specifications where you can find that type of information. We have plastic sleeves and paper envelopes. They are often used together. Using a plastic sleeve that opens like a book reduces the risk of scratching your negative during insertion. It can then be safely slid into a paper envelope.<\/p>\n\n\n\n<p>Many reputable resources recommend using polyester, polypropylene, and high density polyethylene for storing negatives, but, multiple conservators have <a href=\"https:\/\/ask.loc.gov\/preservation\/faq\/422211\" target=\"_blank\" rel=\"noreferrer noopener\">advised against storing nitrate and acetate films in plastic<\/a>. It&#8217;s fine to store polyester in plastic sleeves, but you are more likely to find acetate and nitrate film in your collection. It&#8217;s okay to store newer acetate negatives in plastic.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>According to photo conservator <a href=\"https:\/\/gawainweaver.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">Gawain Weaver<\/a>, if stored in a climate-controlled home, acetate negatives from the 1990s are ok to store in plastic. The line between ok to store in plastic or not falls sometime in the 1970s or 1980s. Storing in plastic is okay in the short and medium term for the newer acetate. And because cold storage basically slows time down to almost a standstill, if they are in cold storage then effectively they stay \u201cnewer\u201d for a very, very long time.<\/p>\n<\/blockquote>\n\n\n\n<p>I came across <a href=\"https:\/\/richardhess.com\/notes\/2006\/10\/16\/acetate-tape-buffered-by-cardboard-box\/\" target=\"_blank\" rel=\"noreferrer noopener\">this interesting theory<\/a> that seems to back up the experts&#8217; pro-paper stance (paper is breathable and can absorb off-gassing, whereas plastic cannot). Apparently, acetate audio tapes have not suffered from vinegar syndrome to the same extent as motion picture films. The author notes that audio tapes were normally stored in cardboard boxes which absorbed off-gassing (and allowed gasses to escape), while sealed film cans trapped the harmful gasses with the film.<\/p>\n\n\n\n<p>For the record, many, many photographers store their film in plastic sleeves or pages and have done so for many decades. Archivists are in charge of items that they want to preserve for as long as possible within their budget constraints. We are not telling you not to use plastic sleeves. We are giving you as much relevant information on the topic as we can find so that you can make an informed decision. If you would prefer to use paper only, I will discuss a DIY solution later in this article.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/negative-file-folders\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"970\" height=\"412\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/22-001-Negative-File-Folders-BLOG.jpg\" alt=\"35mm and medium format film strips inside side lock sleeves and an archival negative file folder\" class=\"wp-image-24297 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/22-001-Negative-File-Folders-BLOG.jpg 970w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/22-001-Negative-File-Folders-BLOG-600x255.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/22-001-Negative-File-Folders-BLOG-768x326.jpg 768w\" data-sizes=\"(max-width: 970px) 100vw, 970px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 970px; --smush-placeholder-aspect-ratio: 970\/412;\" \/><\/a><figcaption class=\"wp-element-caption\">We have Side Lock Film Sleeves for 35mm, medium format, and large format negatives. You can store multiple strips (such as one roll) inside the Negative File Folders which makes it easy to sort, organize, and notate your negatives.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Paper Envelopes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.archivalmethods.com\/product\/open-end-envelopes\" target=\"_blank\" rel=\"noreferrer noopener\">Open-End Envelopes<\/a> &#8211; acid-free, lignin-free, and buffered. Sealed on three sides, open on short edge, no flap, no notch. These feature two side seams, as recommended for archival storage. You should still insert your negatives emulsion side facing away from seams. We have them for 4 x 5, 5 x 7, and 8 x 10 negatives. If you have single frame medium format negs you could store them in the 4 x 5 envelopes. You can store multiple negatives in one envelope if using paper or plastic interleaving folders.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.archivalmethods.com\/product\/negative-file-folders?zCountry=US\" target=\"_blank\" rel=\"noreferrer noopener\">Negative File Folders<\/a> &#8211; acid-free, lignin-free, and buffered. Alternating tabs for labeling, sorting, and accessing. Can store multiple negative strips &#8211; 35mm or medium format &#8211; in one folder.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.archivalmethods.com\/product\/4-x-6-archive-envelopes\" target=\"_blank\" rel=\"noreferrer noopener\">Archival Photo Envelopes<\/a> &#8211; acid-free, lignin-free, but not buffered. The envelope consists of two pockets, one for storing your prints and one for the corresponding negatives, like old photo lab envelopes. Can hold multiple strips of four 35mm frames and possibly smaller early medium format negs.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/hd-poly-envelopes?zCountry=US\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"1000\" height=\"376\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/4x5-neg-HD-poly-cardstock-BLOG.jpg\" alt=\"A vintage 4 x 5 negative stored inside a High Density (HD) Polyethylene Envelope with a piece of acid-free White Card-Stock behind it\" class=\"wp-image-24371 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/4x5-neg-HD-poly-cardstock-BLOG.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/4x5-neg-HD-poly-cardstock-BLOG-600x226.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/4x5-neg-HD-poly-cardstock-BLOG-768x289.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/376;\" \/><\/a><figcaption class=\"wp-element-caption\">A vintage 4 x 5 negative stored inside a High Density (HD) Polyethylene Envelope with a piece of acid-free White Card-Stock behind it. The card stock isn&#8217;t necessary but it provides space to write identification info if desired.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Plastic Sleeves<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.archivalmethods.com\/product\/side-lock-film-sleeves\" target=\"_blank\" rel=\"noreferrer noopener\">Polyester Side Lock Film Sleeves<\/a>\n<ul class=\"wp-block-list\">\n<li>for 35mm and medium format strips and 4 x 5, 5 x 7, and 8 x 10 sheets (<a href=\"https:\/\/www.archivalmethods.com\/product\/side-loading-print-sleeves\" target=\"_blank\" rel=\"noreferrer noopener\">and larger<\/a>, if needed)<\/li>\n\n\n\n<li>polyester is extremely clear and inert and has a natural static charge<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><a href=\"https:\/\/www.archivalmethods.com\/product\/film-interleaving-folder\" target=\"_blank\" rel=\"noreferrer noopener\">Polyester Film Interleaving Folders<\/a>\n<ul class=\"wp-block-list\">\n<li>for 4 x 5 and 5 x 7 negatives<\/li>\n\n\n\n<li>sealed on one short end only so these need to be used with Open-End Envelopes<\/li>\n\n\n\n<li>insert them open end first<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><a href=\"https:\/\/www.archivalmethods.com\/product\/side-lock-film-sleeves\" target=\"_blank\" rel=\"noreferrer noopener\">Polypropylene Side Lock Film Sleeves<\/a>\n<ul class=\"wp-block-list\">\n<li>for 35mm strips<\/li>\n\n\n\n<li>very clear but less so than polyester, also less stiff<\/li>\n\n\n\n<li>less static than polyester<\/li>\n\n\n\n<li>less expensive than polyester<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><a href=\"https:\/\/www.archivalmethods.com\/product\/hd-poly-envelopes\" target=\"_blank\" rel=\"noreferrer noopener\">High Density Polyethylene Envelopes<\/a>\n<ul class=\"wp-block-list\">\n<li>for 4 x 5, 5 x 7, 6-1\/2 x 8-1\/2, 8 x 10, and 11 x 14<\/li>\n\n\n\n<li>semi-transparent so you can see the image inside without removing it<\/li>\n\n\n\n<li>like all the plastics, not good for writing on<\/li>\n\n\n\n<li>you can add a piece of <a href=\"https:\/\/www.archivalmethods.com\/product\/acid-free-14-pt-card-stock\" target=\"_blank\" rel=\"noreferrer noopener\">White Card Stock<\/a> as a support within the envelope (which you could also notate on the back)<\/li>\n\n\n\n<li>soft, static-free material reduces risk of scratching<\/li>\n\n\n\n<li>less expensive than archival envelopes<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/film-interleaving-folder\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"1000\" height=\"753\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Negative-file-folders-1.jpg\" alt=\"Putting a 4 x 5 negative into a polyester Film Interleaving Folder and then sliding that into a 4 x 5 Open-End Envelope.\" class=\"wp-image-24294 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Negative-file-folders-1.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Negative-file-folders-1-600x452.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Negative-file-folders-1-768x578.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/753;\" \/><\/a><figcaption class=\"wp-element-caption\">Putting a 4 x 5 negative into a polyester Film Interleaving Folder and then sliding that into a 4 x 5 Open-End Envelope. <\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"plastic-free\">Plastic-Free Film Storage Solutions<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/teflon-folder?zCountry=US\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"1000\" height=\"753\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/35mm-permalife-folders-in-box-bone-folder-archival-methods.jpg\" alt=\"35mm negatives stored in archival paper folders inside File Folders in a Hinged Lid Box. Bone folder shown for making folders\" class=\"wp-image-24392 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/35mm-permalife-folders-in-box-bone-folder-archival-methods.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/35mm-permalife-folders-in-box-bone-folder-archival-methods-600x452.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/35mm-permalife-folders-in-box-bone-folder-archival-methods-768x578.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/753;\" \/><\/a><figcaption class=\"wp-element-caption\">If you&#8217;re going to make your own archival paper folders for negatives, I highly recommend using a bone folder. Our 8&#8243; bone folder makes it easy to give your folders a nice, sharp crease.<\/figcaption><\/figure>\n\n\n\n<p>Once I learned that some conservators cautioned against plastic enclosures for film I decided to figure out a suitable alternative. First, I asked what is the function of the plastic sleeve? <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>during handling, viewing, and inspection it provides some rigidity and support, and protects from fingerprints<\/li>\n\n\n\n<li>it protects the negatives from scratches while inserting into envelopes<\/li>\n\n\n\n<li>it acts as interleaving between negative strips that are stored together in the same envelope (such as a &#8220;roll&#8221; of film which would have four to six strips)<\/li>\n<\/ul>\n\n\n\n<p>The fingerprint problem can be solved by wearing <a href=\"https:\/\/www.archivalmethods.com\/category\/gloves\" target=\"_blank\" rel=\"noreferrer noopener\">gloves<\/a> when handling your negatives. Make archival paper folders as an alternative to the plastic folders. They will act as interleaving and protect from scratches. It&#8217;s an easy DIY solution.<\/p>\n\n\n\n<p>One drawback to using paper folders is the negatives are not secure in the folders like they are in the side lock sleeves. Even the polyester Interleaving Folders have a static charge that helps keep the negative in place. With Paper folders you must be careful whenever you need to handle them. But if the negatives are not an &#8220;active&#8221; collection (ie: being accessed and used often), but are just being preserved safely, this should not be an issue.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4 x 5 \/ Medium Format Single Frames<\/h3>\n\n\n\n<p>I created simple archival paper folders to be used in conjunction with our 4 x 5 <a href=\"https:\/\/www.archivalmethods.com\/product\/open-end-envelopes\" target=\"_blank\" rel=\"noreferrer noopener\">Open-End Envelopes<\/a>. You can order a package of 8 x 10 paper, and ask for it to be cut in half length-wise to create 2 stacks of 4 x 10 sheets. Each sheet can be then be folded in half to make a 4 x 5 folder. This acts as interleaving to separate multiple negatives in one open-end envelope.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/permalife-20-lb-bond-paper?zCountry=US\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"1000\" height=\"753\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/4x5-folder-archival-methods.jpg\" alt=\"Early 20th century medium format negatives stored in archival paper folders\" class=\"wp-image-24431 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/4x5-folder-archival-methods.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/4x5-folder-archival-methods-600x452.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/4x5-folder-archival-methods-768x578.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/753;\" \/><\/a><figcaption class=\"wp-element-caption\">4 x 10&#8243; Permalife Paper (132-410) that I folded in half to create folders for these 4 x 5 negatives<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/open-end-envelopes?zCountry=US\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"998\" height=\"351\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/4x5-folders-envelope-BLOG.jpg\" alt=\"Early 20th century medium format negatives stored in archival paper folders inside Open End Envelope\" class=\"wp-image-24434 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/4x5-folders-envelope-BLOG.jpg 998w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/4x5-folders-envelope-BLOG-600x211.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/4x5-folders-envelope-BLOG-768x270.jpg 768w\" data-sizes=\"(max-width: 998px) 100vw, 998px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 998px; --smush-placeholder-aspect-ratio: 998\/351;\" \/><\/a><figcaption class=\"wp-element-caption\">The above four negatives stored together in an Open End Envelope which can be labeled to easily find the negative you need<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1000\" height=\"753\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Medium-format-4x5-folder-archival-methods.jpg\" alt=\"Early 20th century medium format negatives stored in archival paper folders inside Open End Envelope\" class=\"wp-image-24435 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Medium-format-4x5-folder-archival-methods.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Medium-format-4x5-folder-archival-methods-600x452.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Medium-format-4x5-folder-archival-methods-768x578.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/753;\" \/><figcaption class=\"wp-element-caption\">Same system seen above but this time illustrating that they can also be used to store old large roll film negatives<\/figcaption><\/figure>\n\n\n\n<p>Depending on the size of your medium format negatives, you could also order 4 x 6 Permalife Paper (132-46) and fold it in half to create a 3 x 4 folder for smaller medium format negatives. You could use pencil to label each folder along the edge (before inserting negative) so you know which negative is which without having to open the folder and look at them.<\/p>\n\n\n\n<p>I tested several of our papers and my favorite for this project was the <a href=\"https:\/\/www.archivalmethods.com\/product\/permalife-20-lb-bond-paper?zCountry=US\">Permalife Bond Paper<\/a>. While our <a href=\"https:\/\/www.archivalmethods.com\/product\/archival-tissue\" target=\"_blank\" rel=\"noreferrer noopener\">Archival Tissue<\/a> and <a href=\"https:\/\/www.archivalmethods.com\/product\/archival-thin-paper-unbuffered\" target=\"_blank\" rel=\"noreferrer noopener\">Archival Thin Paper &#8211; Unbuffered<\/a> would also work, they are both very thin. The thinness means they take up less space and are less expensive, but they are less rigid (and therefore less supportive) and more finicky to work with. Order a <a href=\"https:\/\/www.archivalmethods.com\/product\/mat-board-and-paper-samples\" target=\"_blank\" rel=\"noreferrer noopener\">Board &amp; Paper Sample Pack<\/a> if you&#8217;d like to compare our paper options before you decide. <\/p>\n\n\n\n<p>I will show examples of the Thin Paper and the Permalife. We now offer the Permalife in pre-cut sizes for making your own paper folders (4 x 6, 4 x 10, 5-1\/2 x 10). Do not use Glassine Interleaving with negatives (or gelatin silver prints) because in certain conditions it runs the risk of sticking to the emulsion).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">35mm and Medium Format Film Strips<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Folder Method<\/h4>\n\n\n\n<p>The simplest method is to do what I did above but with long folders to be used with our <a href=\"https:\/\/www.archivalmethods.com\/product\/negative-file-folders\">Negative File Folders<\/a>. For 35mm strips you&#8217;d order the 8 x 10 paper cut in half lengthwise again, but you will fold it on the long edge. This 4 x 10 paper folded in half lengthwise results in a 2 x 10 folder. Our negative file folders are 10&#8243; long and can hold a roll of 36 exposures cut into strips of 6 frames each.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/negative-file-folders\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"999\" height=\"591\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Thin-Paper-DIY-Negative-Folders-35mm-BLOG.jpg\" alt=\"Strips of 35mm negatives stored plastic binder page being moved to archival paper folders inside Negative File Folders\" class=\"wp-image-24335 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Thin-Paper-DIY-Negative-Folders-35mm-BLOG.jpg 999w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Thin-Paper-DIY-Negative-Folders-35mm-BLOG-600x355.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Thin-Paper-DIY-Negative-Folders-35mm-BLOG-768x454.jpg 768w\" data-sizes=\"(max-width: 999px) 100vw, 999px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 999px; --smush-placeholder-aspect-ratio: 999\/591;\" \/><\/a><figcaption class=\"wp-element-caption\">From left clockwise: original sleeves from processing lab, 4 x 10 pieces of Thin Paper, paper folded in half with negatives inside, Negative File Folder, and negative strip of 6 exposures with folder open.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Side Note: Don&#8217;t Store Your Negatives Like This!<\/h2>\n\n\n\n\n\n<p>I had an old Kodak Printing Paper box overstuffed with negatives stored in my attic. Of course this was a very bad storage option. Now that I work here I&#8217;m making better choices. In the above photo you might notice an area of the plastic that looks puckered. That&#8217;s because it was stuck to my negative in that spot. Luckily it was stuck to the base and not the emulsion and it separated without damaging the negative.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1000\" height=\"753\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Kodak-box-full-of-negatives-archival-methods.jpg\" alt=\"Kodak paper box used to store various negatives in plastic binder sleeves.\" class=\"wp-image-24345 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Kodak-box-full-of-negatives-archival-methods.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Kodak-box-full-of-negatives-archival-methods-600x452.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Kodak-box-full-of-negatives-archival-methods-768x578.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/753;\" \/><figcaption class=\"wp-element-caption\">An example of how not to store your film. These negatives and contact sheets stored in less than ideal conditions &#8211; in an acidic box in a hot, humid attic. <\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"995\" height=\"630\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Negatives-damaged-in-sleeves-sticking-BLOG-archival-methods-1.jpg\" alt=\"35mm negatives stored in HD poly sleeves from processing lab showing damage from heat and humidity\" class=\"wp-image-24380 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Negatives-damaged-in-sleeves-sticking-BLOG-archival-methods-1.jpg 995w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Negatives-damaged-in-sleeves-sticking-BLOG-archival-methods-1-600x380.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Negatives-damaged-in-sleeves-sticking-BLOG-archival-methods-1-768x486.jpg 768w\" data-sizes=\"(max-width: 995px) 100vw, 995px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 995px; --smush-placeholder-aspect-ratio: 995\/630;\" \/><figcaption class=\"wp-element-caption\">More negatives that were stored in the above box that were not so lucky. The plastic is stuck to the negatives and when separating them, the negs get damaged. The sleeves they are in are most likely high density polyethylene (considered safe for negative storage), yet because the heat and humidity were high for extended periods the negatives stuck to the plastic.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Now Back to More Archival Storage Options<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/archival-thin-paper-unbuffered\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"630\" height=\"753\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/combo-pic.jpg\" alt=\"Strips of 35mm negatives stored in archival paper folders inside Negative File Folders\" class=\"wp-image-24336 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/combo-pic.jpg 630w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/combo-pic-502x600.jpg 502w\" data-sizes=\"(max-width: 630px) 100vw, 630px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 630px; --smush-placeholder-aspect-ratio: 630\/753;\" \/><\/a><figcaption class=\"wp-element-caption\">35mm negatives stored inside paper folders in Negative File Folders<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Notes on the above image: <em>Top<\/em>: I wrote the negative numbers in the upper right corner on the paper folders (Thin Paper). <em>Middle<\/em>: I inserted the seven folders with negatives (this roll had 38 exposures on it) into the Negative File Folder which I labeled with location and year. There&#8217;s plenty of room to write more extensive notes. <em>Bottom<\/em>: shows the negatives nestled in their new home &#8211; the Negative File Folder. I inserted the folders with the open side facing down for added protection but you have to remember to flip the File Folder upside down before removing them if you do this! They&#8217;re ready to go into an archival metal edge box and be put on a closet shelf in my climate-controlled living space.<\/p>\n\n\n\n<p>For strips of medium format film you can request the 8 x 10 pack of Thin Paper be cut down to 5-1\/2 x 10 so that it can be folded lengthwise to be a 2-1\/4 x 10 folder. If you opt to use Permalife those come in pre-cut sizes.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/archival-thin-paper-unbuffered?zCountry=US\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"1000\" height=\"753\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Thin-Paper-DIY-Negative-Folders-med-format-archival-methods.jpg\" alt=\"Strips of medium format negatives stored in archival paper folders inside Negative File Folders\" class=\"wp-image-24383 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Thin-Paper-DIY-Negative-Folders-med-format-archival-methods.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Thin-Paper-DIY-Negative-Folders-med-format-archival-methods-600x452.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Thin-Paper-DIY-Negative-Folders-med-format-archival-methods-768x578.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/753;\" \/><\/a><figcaption class=\"wp-element-caption\">8 x 10 Archival Thin Paper &#8211; Unbuffered cut to 5-1\/2 x 10 sheets (by request) which you can fold in half lengthwise to create a folder for strips of medium format film.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.archivalmethods.com\/product\/permalife-20-lb-bond-paper?zCountry=US\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"1000\" height=\"753\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Permalife-folders-BLOG.jpg\" alt=\"35mm negatives stored in Permalife paper folders inside Negative File Folders\" class=\"wp-image-24386 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Permalife-folders-BLOG.jpg 1000w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Permalife-folders-BLOG-600x452.jpg 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/Permalife-folders-BLOG-768x578.jpg 768w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/753;\" \/><\/a><figcaption class=\"wp-element-caption\">Here&#8217;s an example of using the Permalife 20lb Bond Paper to make folders for storing 35mm negative strips. The heavier weight paper makes it easier to work with and you can still fit a whole roll into one Negative File Folder. Permalife comes in pre-cut sizes ready to be folded.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"resources\">Resources<\/h2>\n\n\n\n<p>As I researched this post I came across opinions and advice that sometimes varied from source to source. We always try to give you the best advice, but we are not trained conservators. If you&#8217;d like to consult a conservator here is a <a href=\"https:\/\/www.culturalheritage.org\/home\" target=\"_blank\" rel=\"noreferrer noopener\">useful tool for finding them<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DIY Paper Folder Sizes<\/h3>\n\n\n\n<p>All of these paper sizes can be ordered on the <a href=\"https:\/\/www.archivalmethods.com\/product\/permalife-20-lb-bond-paper\" target=\"_blank\" rel=\"noreferrer noopener\">Permalife Bond Paper<\/a> page. If you opt for another paper (any except Glassine!) you may have to order a size up and have it cut down.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1046\" height=\"347\" data-src=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/archival-methods-DIY-negative-folders.png\" alt=\"\" class=\"wp-image-24632 lazyload\" data-srcset=\"https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/archival-methods-DIY-negative-folders.png 1046w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/archival-methods-DIY-negative-folders-600x199.png 600w, https:\/\/blog.archivalmethods.com\/wp-content\/uploads\/archival-methods-DIY-negative-folders-768x255.png 768w\" data-sizes=\"(max-width: 1046px) 100vw, 1046px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1046px; --smush-placeholder-aspect-ratio: 1046\/347;\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Here&#8217;s a list of sources consulted for this post.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.amianet.org\/wp-content\/uploads\/Resource-Nitrate-Identifying-and-Handling.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Identifying and Handling Nitrate Film<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.nps.gov\/subjects\/hfc\/history-of-film-types-timeline.htm\" target=\"_blank\" rel=\"noreferrer noopener\">History of Film Timeline<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.nedcc.org\/free-resources\/preservation-leaflets\/5.-photographs\/5.1-a-short-guide-to-film-base-photographic-materials-identification,-care,-and-duplication\" target=\"_blank\" rel=\"noreferrer noopener\">A Short Guide to Film Base Photographic Materials<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.nfsa.gov.au\/preservation\/guide\/home\/caring-film\" target=\"_blank\" rel=\"noreferrer noopener\">Caring for Film<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.canada.ca\/en\/conservation-institute\/services\/conservation-preservation-publications\/technical-bulletins\/care-plastic-negative.html#a3b\" target=\"_blank\" rel=\"noreferrer noopener\">Care of Plastic Film-based Negative Collections<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/s3.cad.rit.edu\/ipi-assets\/publications\/acetate_guide.pdf\">IPI Storage Guide for Acetate Film<\/a><\/li>\n\n\n\n<li><a href=\"http:\/\/www.wilhelm-research.com\/pdf\/HW_Book_14_of_20_HiRes_v1c.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Envelopes and Sleeves for Films and Prints<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.archives.gov\/preservation\/holdings-maintenance\/film-based\" target=\"_blank\" rel=\"noreferrer noopener\">Film-Based Negatives and Positives<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/ask.loc.gov\/preservation\/faq\/422211\">How to Preserve Photographs and Negatives<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cool.culturalheritage.org\/byauth\/fischer\/fischer1.html\" target=\"_blank\" rel=\"noreferrer noopener\">Guidelines for Care &amp; Identification of Film-Base Photographic Materials<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gawainweaver.com\/images\/uploads\/Horvath_AcetateNegativeSurvey.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">The Acetate Negative Survey (Horvath)<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gawainweaver.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">Gawain Weaver Art Conservation<\/a><\/li>\n<\/ul>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Negatives are one of the less stable materials in an archive. Two of the once dominant plastic supports used to make negatives (cellulose nitrate and&hellip;<\/p>\n","protected":false},"author":2,"featured_media":24401,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[376],"tags":[],"series":[],"class_list":["post-24267","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-storage"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Store and Preserve Negatives &#8211; Archival Methods Blog<\/title>\n<meta name=\"description\" content=\"The majority of old film is acetate or nitrate, which are unstable. 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