Acid Free (Paper): The use of this term varies from the logical definition of the individual words to a wide variety of standards – always have a company explain their definition. See Also Archival webpage. Having no acidity and no residual acid-producing chemicals. Below is a definition from “Preserving Family Keepsakes Do’s and Don’ts”, Ilene Chandler Miller, 1996:
“Any paper that contains an alkaline (pH higher than 7 or an absence of acid) base and is often lignin-free.”
Acid Transfer: The act of acid migrating from one object or item to another. See Also Archival webpage.
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