Archival Methods 32x40" Acid-Free Card Stock, 148gsm, 50/Pack, White

• Archival, acid- and lignin-free, white color • Easily creased for folding • pH 9 (+/-0.5), acid free • 0.008 of inch, 100 Lb basis weight (20x26) • Alpha-cellulose pulp from purified wood fiber • 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 • No dyes and non-bleeding • Board passes the PAT (Photographic Activity Test) ISO IT 18916 (formerly ISO 14523 ANSI IT9.16). • Lignin content is tested by TAPPI 236 cm-85 and has a Kappa number of less than five Application: • Stiffening and support inserts for sleeves, sheet protectors and pocketed pages • Album pages for mounting photographs or documents • Acid free backing in picture frames • Can be written on to add titles, identification information, etc