Conservation Grade Backings for FLAT Newspapers 15-5/8 x 23-1/4"  .040" thick Acid & Lignin-Free Buffered Board. Indefinite Storage.

Conservation Grade Backings
for Flat Newspapers. 
15-5/8 x 23-1/4"
.040" thick Acid-Free, Lignin-free & Buffered Board
All White. Use for indefinite storage

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.