Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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B-stage

A secondary stage in the reaction of some thermosetting resins, characterized by softening of the resin when heated and swelling when in the presence of certain liquids. but without complete fusing or dissolving. The "b-stage" is also characterized by a progressive increase in viscosity. The resin portion of an uncured thermosetting adhesive is usually in this stage. Also called "resitol." See also: A-STAGE ; C-STAGE . (309 )




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