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Stoneware is a piece with (or without) enamel, mostly composed of materials with 1200 to 1300 degree C of heat.
Stoneware are utterly opaque, but have a highest strength in French, it is called "Gres", in German "Steinzeng" and in Persian
"Chini-Sangi".
Species of Stoneware:
1-Natural
Stoneware, produced from a kind of clay with maximum un-purity.
2-Fine Stoneware, produced of full
adhesive and little adhesive clays.
3-Technical and non-porous
Stoneware, produced from raw materials under control, mixed carefully and heated, with minimum porosity; these are used in most chemical industries.
4-Jasper
Stoneware, in which combinations of Barium are used in abundance.
5-Bazaltic
Stoneware, in which a lot of Iron-Oxide is used in the body.
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