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acid-free paper

Broader Term: 

n. ~ Paper with a pH of 7.0 or greater when manufactured.


Acid-free papers are distinguished from papers that contain a residue of the acids used to break up wood fibers during manufacture. The residual acid continues to attack the paper fibers, making the paper brittle over time. Archival papers are typically made from alpha cellulose, are lignin free, and often contain an alkaline buffer to counter any trace of acids used in processing or environmental acids.

A Glossary of Archival and Records Terminology