Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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gallic acid

A white, crystalline acid (C 7 H 6 O 5 ), that occurs widely in plants both in the free form, as in GALLS and combined in tannins, from which it may be obtained by the action of molds or an alkali. It is used principally in the manufacture of pyrogallol tannins, dyes, and writing inks. See also: VEGETABLE TANNINS . (235 )

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