Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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Substances used to wear down or clean other substances. Abrasives may occur naturally (e.g., diamond, corundum, pumice, etc.), or be manufactured (e.g., silicon carbide, fused alumina, metallic abrasives, and the like). The hardness of an abrasive is measured by MOHS' SCALE , which is arbitrary. For numerous grinding and buffering purposes, the graded grains of abrasive are bonded together in a vitreous rubber or metallic matrix to produce grinding wheels; for hand use, the grains are bonded to paper or cloth by means of a suitable adhesive.

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