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Re: [BKARTS] Questions about methyl cellulose



As past archival product manager at a major supplier to the field I can say that "Acid Free" and "Archival" are buzz words meant to instill feelings of security in the purchaser. This by no means is dishonest on their part, but not always relevant. An example... acid free sleeves for photos. The problem was PVC sleeves that off-gassed chlorine. Acid free as a descriptor for Mylar (an alternative to PVC) is irrelevant, inert would be more appropriate but that's a hard term for folks to understand... Paper turns yellow, but that's more a factor of lignin (especially in non-rag papers) than acidity. I've seen beautifully creamy white paper with a pH around 4...

p.

ps. Lineco = University Products (their consumer market line as opposed to large institutional customers)

Hiromi Paper sells a methyl cellulose from Lineco that says right on the label: Acid Free Archival and neutral pH.


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Peter D. Verheyen
Bookbinder & Conservator, PA - AIC
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