1. Dimensional deviation: the length, width and thickness of bricks are measured with vernier caliper or straight steel ruler (national standard: the deviation between the average size of 4 sides of each brick and the working size).
2. Surface quality: the front of the brick with no less than 1 square meter is laid on the floor, and the light of each part of the brick reaches a certain standard, and then the eye is visually measured within the prescribed distance
In numerous ground adornment material, floor tile becomes the first choice of consumer. Because it has a solid texture, easy to clean, heat - resistant, wear - resistant, acid - alkali - resistant, impervious to water and other advantages.