Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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free water-soluble matter (in leather)

Soluble matter that can be removed from finely ground leather with very little washing. The free water solubles include gallic acid, quinol, catechol, etc. See also: COMBINED TANNIN IN LEATHER ;COMBINED WATER-SOLUBLE MATTER (IN LEATHER) . (363 )

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