Is one of the most important raw material of porcelain glaze, glaze appears in the earliest Shang Dynasty pottery, the original glaze. The Jin dynasties, porcelain making workers more mature grasp of the fired green-glazed porcelain technique. Green glaze firing, bring a fundamental difference in the Tao He porcelain.
Glazed quartz, feldspar, clay and other raw materials, is attached to the surface of the ceramic body thin layer of glass, and some physical and chemical properties similar to glass. Chemical composition: Silicon oxide, iron oxide, aluminium oxide, potassium oxide, sodium oxide, magnesium oxide, calcium oxide, etc. Calcium (calcium oxide) is a very important factor, porcelain kilns in different parts of different materials, such as Jingdezhen wind peat, fengxi, Chaozhou, Guangdong with red ash. Glazes can not only make China increase the mechanical strength, the dielectric strength and prevent the erosion of liquids and gases, is one of the important means to beautify the porcelain. After following the Jin dynasty celadon glaze, white glaze of the Tang dynasty, Song dynasty, red glaze, black enamel appeared, to the Ming and Qing dynasties created a variety of glazes.
Glazes classified by body, glazed enamel pottery glaze and fire stone tools; according to the firing temperature, low temperature medium temperature high temperature glaze and glaze, glaze; glazed feature classes, color glaze, white glaze crystal glaze, variable lines and Crackle glaze. Apart from the above glazes, glaze, opaque glaze, salt, etc. glaze.
Modern ceramics used in the glaze into the lime glaze and feldspathic glaze. Lime glaze is prepared with ash glaze and glaze, feldspar glaze is mainly composed of quartz, feldspar, kaolin, marble, and so on. Adding metal oxides in the lime glaze, feldspar glaze, or into other chemical components, there will be all kinds of glaze. General glazing thickness of thick body 1% 3%, after fire roasted, on the tightly attached to the porcelain, porcelain surface is dense, soft, glossy and bright as a mirror to people feeling.