Sesame gray granite has a very high hardness, so it is often used as a decoration for floors and countertops, which not only makes people look very beautiful and visual, but also has a very long service life. Today, we will come to understand with the editor of FABULOUS Group, how to visually inspect the quality of sesame gray granite?

　　1, stains: use a vernier caliper to measure the scale of stains, and visually measure the number of stains.

　　2. Number of color lines: visually measure the number of color lines.

　　3. Striped color: Lay the plywood board and the inspection board flat on the ground, standing at a distance of 1.5m from the board for visual inspection.

　　4. Manual chiseling: Lay the board flat on the ground, and visually inspect it at a distance of 1.5m from the board.

　　5. Missing corners and chipping angles: measure the length, width, and height of the defect with a vernier caliper; visually check the number of missing corners.

　　6. Cracks: Use visual inspection for visible cracks, and hammering for hidden cracks (that is, hit the plate with a metal hammer, and after sound, it is usually determined.

　　7. Steps: Measure the height of the steps with a vernier caliper, and measure the maximum value as the height of the steps.