Clay

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China Clay

one of the purest of the clays, composed chiefly of the mineral kaolinite usually formed when granite is changed by hydrothermal metamorphism. Usage of the terms china clay and kaolin is not well defined; sometimes they are used synonymously for a group of similar clays, china clays have long been used in the ceramic industry, especially in fine porcelains, because they can be easily molded, have a fine texture, and are white when fired. France's clays are made into the famous svres (see a. Brongniart ) and limoges potteries. These clays are also used as a filler in making paper. In the united states, deposits are found primarily in georgia, north carolina, and pennsylvania; china clay is also mined in england (cornwall) and france.

uses of china clay

china clay in ceramic manufacture, porcelain; bone china; earthenware; white tile body; graniteware; white stoneware; glazes.
paper manufacturing miscellaneous, paint; plaster; alum; ultramarine; whitewash; drugs; soap and face powder; wine clarification; polishing powders; lead pencils.
paper and board, coating clays; fillers; brush coating clays; machine coating clays.
rubberpaint and distemperleathercosmetics, insecticides, dusting and medicinaltextileslinoleumwhite cementultramarineplastics

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