Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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A residue derived from the distillation and subsequent removal of volatile materials (notably turpentine) of the gum of the southern pines, Pinus palustris and P. elliottii. Gum rosin exudes from the living tree, while wood rosin is obtained from the wood by steam and solvent processes. Rosin is essentially an organic acid, the main constituent being abietic acid (C 20 H 30 O 2 ). See also: ROSIN SIZE . (17 , 143 , 235 , 309 )

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