BACKINGS for Mini Comics 5-9/16 x 8-7/16" .040" thick. Acid & Lignin-free. Buffered. All white. Indefinite Storage.

BACKINGS for Mini Comics 5-9/16 x 8-7/16" .040" thick. Acid & Lignin-free. Buffered. All white. Indefinite Storage.

Museum Grade Archival. Our .040" thick board is all white. It is acid- and lignin-free and buffered with a 3% calcium carbonate buffer. Approved by the Library of Congress for indefinite archival storage. Buffered board blocks migrating acids.