Archival Methods 17x22" 4-Ply Conservation Mat Board, 15 Packs, Pearl White

Conservation Board uses alpha-cellulose pulp from purified wood fiber and is therefore more economical to manufacture than cotton Museum Board, yet carries with it the same stable and long-lasting properties. Purified wood pulp paper has a long history of being safe to use with paper artwork, photographs and documents. their high quality Conservation Board is acid- and lignin-free, and incorporates alkaline or neutral sizing. All boards are buffered with calcium carbonate. This ensures protection from the destructive effects of acid migration from the matted work and from a polluted environment that might cause the pH of the mat board to decrease (become more acidic) with age. No optical brightening agents are used in the manufacture of their Conservation Board.• Conservation Board uses alpha-cellulose pulp from purified wood fiber • 2-Ply / 30 Pt. (Approximately 1/32")• 4-Ply / 60 Pt. (Approximately 1/16")• Alkaline sizing is used for both internal and external sizing. No alum is used in the manufacturing process• Buffered with calcium carbonate 2-3% alkaline reserve, pH 9 +/-0.5, acid-free• Color dyes are light-fast and non-bleeding• Board will not degrade and cause harm to mounted matted artwork• Lignin content is tested by TAPPI 236 cm-85 and has a Kappa number of less than five• The single ply sheets are laminated together using all natural starch adhesive• Board passes the PAT (Photographic Activity Test) ISO IT 18916 (formerly ISO 14523 ANSI IT9.16)Application their Pearl White Conservation Mat Board has a warmer tonality than their Bright White Museum Board. It is similar to Antique White, yet with less of a yellow tint. The look, feel and cutting characteristics are very similar to mat boards made from cotton pulp, and it maintains a similar lustrous surface. their Conservation Mat Board is a perfect alternative for those looking for high archival quality at a very attractive price.