a heat-resistant clay.

A clay used for making bricks.

A variation of vitreous china having greater amounts of quartz and feldspar in the clay material beneath the vitreous surface. Fireclay is heavier (30%), denser, and thicker than regular clay. These properties insure smooth, flat surfaces on large fixtures which is not achievable with standard vitreous china.

Refractory clays, high in alumina and containing impurities, which vitrify below 1300 C (2372 F). They fire anywhere from a pale buff to almost white and tend to be speckled with iron particles. Fireclays contain between 10-40% of alumina and between 40-80% of silica. Used in the manufacture of refractory materials, such as bricks, muffles, and kiln furniture.

An earthy or stony mineral aggregate which has as the essential constituent hydrous silicates of aluminum with or without free silica; plastic when sufficiently pulverized and wetted; rigid when subsequently dried; and of suitable refractoriness for use in commercial refractory products.

Fireclay sinks are made from a clay base that is fired at an intense heat to vitrify the clay and fuse the glaze. The result is a durable sink with a nonporous, glossy finish.

A type of vitreous china that includes higher quantities of quartz and feldspar. Better suited for large, smooth surfaces than standard china.

A variation of vitreous china that has greater amounts of quartz and feldspar in the clay material. It is denser, thicker, and heavier than regular clay. These characteristics allow for a durable, smooth, flat surface on large fixtures not attainable with standard vitreous china. Take a look at our selection of Fireclay Kitchen Sinks.

Mixture of clay and minerals, similar to vitreous china, which is molded, glazed and fired at intense temperatures. The smooth, non-porous surface of Kohler's fireclay kitchen sinks won't rust, fade or discolor.

A type of clay which is resistant to high temperatures.