Our conservation gradeSUPER ARCHIVAL BACKING BOARDmaterial meets the Library of Congress archival standards. It is 100% alpha-cellulose, .040" thick, acid-free (alkaline pH 8.5), lignin-free, contaminant-free. It comes buffered with a 3% calcium carbonate buffer.
Use for Indefinite Storage.
Museum Grade Archival 100% alpha-cellulose board, buffered with a 3% calcium carbonate buffer. It is acid-free (alkaline pH 8.0-9.0), lignin-free, contaminant-free. Suitable for conservation. Our material meets the Library of Congress Archival Standards. Acid-free board can trap migrating acids in paper and neutralize it. A buffered board can stop migrating acids from entering an object and therefore prevent damage.
Conservation Grade Backing Board for Window Card Posters 14-1/4 x 22-1/2" .040" thick All white. Lignin-free. Acid-free. Buffered. Contaminant-free.
Meets the Library of Congress archival standards. Indefinite Storage.
Backings for One Sheet Posters 27-1/4 x 41" .040" thick Conservation Grade Acid-Free Board.
Buffered. All-white. Lignin-free. Acid-free. Contaminant-free. Meets Library of Congress archival standards.
Backings for British Quad Posters 30-3/4 x 42-1/2"
.040" thick Conservation Grade Acid-Free Board
Buffered. All white. Lignin-free. Acid-free. Contaminant-free. Meets Library of Congress archival standards.