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ENCLOSURES & SLEEVES
Flap Envelopes Open On Long Side
Designed for the organization and safe archival storage of documents, photographic prints, newspaper clippings, sheet music, and just about any other flat collectibles and ephemera you may have.
Note: Any envelopes you might find elsewhere or you are already using should not be used if they have center seams. Pressure on the seam from adjoining files will usually fall in the center of the contents and over time may cause damage. Archival Methods does not offer any archival envelopes with center seams.
Flaps are on the long side, with a 2 1/2 inch non-adhesive flap that will keep pamphlets and small documents in place. Seams are on the long sides to provide equal thickness in storage and prevent file stacks from “fanning”. Folders are constructed of heavyweight 10-point acid- and lignin-free card stock in a rich cream in color.
ArchivalGrade Cardstock 10 point Specifications
Made from fully bleached, high alpha cellulose pulp. It does not contain any post consumer waste recycled pulp. Paper is free of metal particles, waxes, plasticizers, residual bleach, peroxide, sulfur content is less than 0.0008% reducible sulfur.
The lignin content is measured by the phloroglucinol test with a Kappa number of 5 or less.
Metallic Impurities, Iron will not exceed 150 ppm and copper shall not exceed 6 ppm. No optical brightening agents are used in the pulp.
The paper contains a minimum of 3% calcium carbonate (CaCO3) with a pH range 8-9.5
Alkaline or neutral sizing are used. No alum rosin or rosin sizing are used.
Color pigment dyes are light-fast and non-bleeding.
This paper passes the PAT (Photographic Activity Test) ISO 14523 formally ANSI IT9.16