Most tiles will be printed with their own trademarks on the back. This one is pressed when the tiles are embryonic, and other brand trademarks are affixed on the outside, which belongs to processing on behalf of others, so there is no production license.

Ceramic tile is an acid-and-alkali resistant porcelain or stone material for building or decoration, which is made of refractory metal oxides and semi-metal oxides through grinding, mixing, pressing, glazing and sintering. It is called ceramic tile.