Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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copal

A resinous substance obtained from the exudations of living trees in areas of the tropics, or from fossils, rendered soluble in alcohol or other organic solvents, and used in the manufacture of printing inks and certain varnishes. In its dry form, it is also used in the manufacture of gilding powders. (156 , 264 )




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