Is the glaze of ceramic tile calcined?

The glaze of ceramic tile is calcined glaze.

The "glaze" of ceramic tile refers to the colorless or colored impermeable glass body covering the surface of ceramic tile. Glaze is made of mineral raw materials (feldspar, Yingshi, talc, kaolin, etc.). ) and chemical raw materials in a certain proportion (some raw materials can be made into frits first), ground into glaze slurry, applied to the surface of the blank, and calcined at a certain temperature. Glaze can make ceramic tiles compact, soft in luster, impervious to water and air, improve mechanical strength, thermal stability and dielectric strength, and play the role of decoration, pollution prevention and easy cleaning. Glaze can be divided into low temperature glaze and high temperature glaze according to firing temperature; According to the appearance characteristics, it can be divided into transparent glaze, opaque glaze and matt glaze. According to the function of glaze, it can be divided into base glaze, surface glaze and printing glaze.