You cannot use only one serving.

Gypsum board inspection method

1. Visual inspection The appearance inspection should be at O. Under bright light conditions at a distance of 5m. Conduct a visual inspection of the front of the board. First look at the surface. The surface should be flat and smooth. There should be no pores, stains, cracks, missing corners, uneven colors and incomplete wafers. The upper and lower layers of kraft paper on the paper-faced gypsum board must be strong. It can prevent cracking and the gypsum board will not be cracked when screwing; look at the side to see whether the gypsum texture is dense and whether there is any hollowing. The denser the gypsum board, the more durable it is.

2. Knocking Check the elasticity of the gypsum board. If you tap it with your hands, if it makes a solid sound, it means that the gypsum board is tight and durable. If it makes a very hollow sound, it means that there is a hollow phenomenon in the board and the quality is not good. You can also measure the gypsum board by weighing it with your hands. Advantages and Disadvantages.

3. Deviation The allowable deviation in size, flatness and right-angle deviation must meet the qualified standards. If the deviation of the decorative gypsum board is too large, the decorative surface will be uneven and the entire surface will be uneven. Unevenness will have a great impact on the decorative effect.

4. Look at the logo on each packaging box. There should be the product name, trademark, quality grade, manufacturer name, production date and moisture-proof, Handle with caution and product marks and other signs. When purchasing, you should focus on checking the quality grade signs. The quality grade of decorative gypsum boards is divided according to the allowable deviation of size, flatness and right-angle deviation.

It is recommended that you go to the formal A third-party testing agency went to test the gypsum board. The Kebao test was good. I did the test there