Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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The process of neutralizing the alkali, e.g., calcium hydroxide, used in liming and unhairing hides and skins. Deliming, which usually takes place in conjunction with BATING , is accomplished by running the hides or skins in a drum or paddle to which has been added water and a proprietary compound consisting of a mixture of an ammonium salt (preferably ammonium sulfate) and proteolytic enzymes at a water temperature of 80 to 90° F. For more efficient control, and to produce a particularly fine grain in the leather, the ammonium sulfate (or boric acid), in the amount necessary to neutralize the lime, is added before the addition of the bating enzymes. (291 , 363 )

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