Flap 2-1/2 inch non-adhesive flap is located on the long side, flap folds over to keep the items safe yet accessible

Side Seams provide equal thickness in storage and prevent file stacks from fanning.

Note side seams are recommended over center seams for archival storage. With center seams pressure on the seam from stacked files will usually fall in the center of the contents and over time may cause damage.

Acid-Free - Yes

Lignin-Free - Yes - lignin content is measured by the phloroglucinol test with a Kappa number of 5 or less

Buffered - Yes - contains a minimum of 3% calcium carbonate (CaCO3) with a pH range 8-9.5

P.A.T. passed the Photographic Activity Test ISO 18916

Weight 10-point archival card stock

Composition made from high alpha cellulose pulp. 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.

Sizing alkaline or neutral sizing are used. No alum rosin or rosin sizing are used.

Dyes color pigment dyes are light-fast and non-bleeding

Metallic Impurities iron will not exceed 150 ppm and copper will not exceed 6 ppm

Optical Brighteners - No, none are used

Adhesive seams are sealed with pH neutral PVA adhesive that forms a permanent bond without harming contents

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