What is ceramic tableware?

Ceramic tableware, the traditional concept of ceramics refers to all artificial industrial products made of inorganic nonmetallic minerals such as clay. It includes various products made of clay or mixtures containing clay through mixing, forming and calcination. From the roughest Earth Ware to the finest pottery and porcelain all belong to its scope. The main raw material for it is silicate minerals taken from nature (Such as clay, feldspar, quartz, etc) Therefore, it belongs to the category of 'silicate industry' with glass, cement, enamel, refractory and other industries. The firing and application of ceramic tableware has a long history in our country. It has various shapes, colorful colors, cool and smooth hand feeling, easy to wash, and is deeply loved by Chinese people. The production methods of ceramic tableware are divided into three types: overglaze color, underglaze color and overglaze color. Color-on-glaze ceramics are made of colored paper made of pigments and pasted on the glaze or directly painted on the surface of the product with pigments, and then baked at low temperature. As the baking temperature cannot reach the melting degree of the glaze layer, therefore, flower noodles cannot sink into glaze. Touch the color ceramic on the glaze with your hand, and feel that the flower surface has obvious concave and convex feeling; The baking temperature of the color-in-glaze ceramics can make the glaze melt, and the pigment can sink into the glaze. After cooling, it is covered by the glaze layer, and the surface of the product is smooth, and the hand touch has no obvious concave and convex feeling; All the color ornaments of the underglaze color ceramics are carried out on the porcelain blank. After glazing, they are burned at a time at high temperature. The flower surface is covered by the glaze layer, which looks bright, smooth and feels smooth. The level of ceramic tableware is generally divided into: Level 1: The whole product has no defects, deformation or color difference, and a pinhole is allowed in an inconspicuous place; Level 2: can have 2-3 pinholes, no obvious color difference, slight deformation; Level 3 (Close to defective products): Obvious color difference, slight deformation allowed 1-2 Places of shrinking glaze about 1 square MM.