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Glazing of pottery followed the invention of glass around 1500 BC, in the Middle East and Egypt with alkali glazes including ash glaze, and in China, using ground feldspar. By around 100 BC lead-glazing was widespread in the Old World. [3] Glazed brick goes back to the Elamite Temple at Chogha Zanbil, dated to the 13th century BC.
Stoneware is a vitreous or semi-vitreous ceramic made primarily from stoneware clay or non-refractory fire clay. [10] Stoneware is fired at high temperatures. [11] Vitrified or not, it is nonporous; [12] it may or may not be glazed.
Types of Glazing in Pottery. Glazing in pottery is the process of applying a coating or layer of material to ceramics that, when fired, forms a vitreous or glass-like surface. Glazes enhance the aesthetic appeal of pottery, provide a waterproof barrier, and improve its durability. Below are the major types of glazing commonly used in pottery: 1.
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Tin-glazing is the process of giving tin-glazed pottery items a ceramic glaze that is white, glossy and opaque, which is normally applied to red or buff earthenware. Tin-glaze is plain lead glaze with a small amount of tin oxide added. [1] The opacity and whiteness of tin glaze encourage its frequent decoration.
Maiolica charger from Faenza, after which faience is named, c. 1555; diameter 43 cm, tin-glazed earthenware Tin-glazed (majolica/maiolica) plate from Faenza, Italy. Tin-glazed pottery is earthenware covered in lead glaze with added tin oxide [1] which is white, shiny and opaque (see tin-glazing for the chemistry); usually this provides a background for brightly painted decoration.
Rio Grande Glaze Ware was first made about AD 1315 (based on tree-ring dating at Tijeras Pueblo). It partly displaced an earlier tradition of black-on-white pottery and was inspired by the White Mountain Red Ware tradition (Carlson 1970) centered on the upper Little Colorado drainage of eastern Arizona and western New Mexico.
At the same time in China, green-glazed pottery dating back to the Han period (25–220 AD) gave rise eventually to the sancai ('three-color') Tang dynasty ceramics, where the white clay body was coated with coloured glazes and fired at a temperature of 800 degrees C. Lead oxide was the principal flux in the glaze.
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