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Entries in acid (2)

Tuesday
Jul202010

Museum Grade

A cotton rag paper that is of archival quality. Most museum grade papers adhere to ISO 11108 Standards. The term is used loosely by manufacturers and care should be taken to confirm that individual products meet the standards and/or are at least acid- and lignin-free.

Tuesday
Jul202010

pH Value

pH value indicates whether the paper is acidic or alkaline. Acidic paper will deteriorate over time, buffering the paper lowers the pH by adding alkaline and can increase the life of the paper by helping to absorb any acid in materials that may come in to contact with the paper. Calcium carbonate is the most common buffering agent.