Elmer's Bienfang 100% Cotton Rag Foam Board 32"x40"x3/16"

When archival quality mounting is needed, this specialty Foam Board gives a commanding performance. 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.