A type of pottery midway between earthenware and porcelain being made of clay and a fusible stone. It is fired to a point where partial vitrification renders it impervious to liquids, but, unlike porcelain, it is very seldom more than faintly translucent. The vitrification makes it unnecessary to add a glaze, but for reasons of utility and appearance decorative glazes are sometimes used, such as salt glaze and lead glaze. ILDC89
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