Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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The process of lightening the color and removing metallic stains from the grain surface of newly tanned leather. Clearing is done by drumming the leather in a cold solution of weak acid, e.g., a.25 or 1% solution of oxalic (H 2 C 2 O 4 ) or sulfuric (H 2 SO 4 ) acid; if heavy STRIPPING (1) or clearing is required, or if the original tannage was not satisfactory for the leather required, it is not uncommon to retan the leather at this time. (306 )

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