Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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acetate envelopes

Envelopes, usually made of transparent cellulose acetate. used for the temporary protection of documents, letters, prints, photographs, maps, etc. They are superior to paper envelopes in that they substantially reduce the danger of acid transfer. Their use, however, is declining in favor of polyester envelopes. See also: CELLULOSE ACETATE ; POLYESTER FIBERS .

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