2. Natural and synthetic materials used in the manufacture of covering materials for books. They include granulated leathers and paper fibers bonded with latex, impregnated paper fibers, matted polyethylene fibers, and the like. 3. A clothlike material composed of paper fibers longer than those normally used in papermaking, but which are not woven but matted by felting on a fine mesh screen from a suspension of water or air, and with or without binders. (17 , 220 )
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