Material these are made from the same archival box board that we use to make our metal edge boxes. Find sample of this board in the Raw Material Sample Pack (item #ABRM)

Stiffness these are heavier than our White Card Stock and our 2-ply Matboard. They are close in thickness to our 4-ply Matboard.

Store photos, prints, magazines, artwork, paintings, documents, letters, and ephemera

Cost comparing price per sheet these cost slightly more than 2-ply Pearl Conservation Board and less than Foamboard

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

Finish gray and white with smooth plate finish

Board is 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.

Board Weight .056'' thick

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

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

Optical Brighteners - No, none are used

Dyes are light-fast and non-bleeding

Surface of the paper is smooth and free from knots, shives, and abrasive particles