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This pack of 11 x 17" Warm White 4-Ply 100% Museum Board from Archival Methods contains 25 boards that are 1/16" thick. The board is designed for matting, mounting and preservation of fine prints, precious documents, as well as for traditional and digital photography. The 4-ply thickness is ideal for window mats and mat backing, creates a separation between artwork and glazing, and provides a flat, supportive backing.
The boards are acid- and lignin-free and use alkaline or neutral sizing. No brightening agents are used and no yellow cast is present. All boards are buffered with calcium carbonate to ensure that a polluted environment won't cause paper's pH value to decrease with age.
Made from 100% Cotton fiber pulp (99% Alpha Cellulose). Does not contain any post consumer waste recycled pulp. Paper is free of metal particles, waxes, plasticizers and residual bleach peroxide. Sulfur content is less than 0.0008% reducible sulfur. Iron content does not exceed 150 ppm and copper does not exceed 6 ppm. No optical brightening agents are used in the pulp
Alkaline sizing is used for both internal and external sizing. No alum is used in the manufacturing process
Calcium carbonate buffered with 2 to 3% alkaline reserve
Acid-free
Light-fast and non-bleeding color dyes
Won't degrade or harm mounted matted artwork
Board passes the PAT (Photographic Activity Test) ISO 14523 (formerly ANSI IT9.16)
Lignin content is tested by TAPPI 236 cm-85 and has a Kappa number of less than five
Single ply sheets are laminated together using all natural starch adhesive