Conservation-Grade Backings for
20 x 24" Images.
.040" thick Alpha Cellulose board.
Acid-free, Lignin-free, Buffered. All white.
Indefinite Storage.

Conservation Grade Backing Boards for
Prints & Posters 20x 24" .040" thick. All white. Lignin-free. Acid-free. Buffered. Contaminant-free. Meets the Library of Congress archival standards. Indefinite Storage.