Acid-free paper
Type of paper used for preservation
Acid-free paper
Acid-free paper is paper that, if infused in water, yields a neutral or basic pH (7 or slightly greater). It can be made from any cellulose fiber as long as the active acid pulp is eliminated during processing. Acid-free paper addresses part of the problem of preserving documents and preserving artwork for long periods. Archival paper has a more exacting specification and is expected to last even longer.
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