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The "clay body" is also called the "paste" or the "fabric", which consists of 2 things, the "clay matrix" – composed of grains of less than 0.02 mm grains which can be seen using the high-powered microscopes or a scanning electron microscope, and the "clay inclusions" – which are larger grains of clay and could be seen with the naked eye or ...
Grog, temper for clay. Grog, also known as firesand and chamotte, is a raw material usually made from crushed and ground potsherds, reintroduced into crude clay to temper it before making ceramic ware. It has a high percentage of silica and alumina. It is normally available as a powder or chippings, and is an important ingredient in Coade stone.