32 x 40 x 3/16 Cotton Rag Foam Board - 25 Pack

When archival quality mounting is needed, this specialty Foam Board gives a commanding performence. Its facing paper on each side has a pH of 8.2 +/- .5 and a calcium carbonate buffer. Constructed with pure, naturally white cotton fibers, this Foam Board contains no lignin, alum or harsh chemicals . Sold in cartons only.