First, visual inspection
In the visual inspection, the front side of the board should be visually inspected under the condition of bright light of 0.5m. The surface should be seen first, the surface should be smooth and smooth, and there should be no pores, stains, cracks, corners, uneven colors and incomplete patterns. The two layers of protective paper on the upper surface of the gypsum board should be strong, which can prevent cracking and crack the gypsum board when the screws are screwed; look at the side to see if the gypsum texture is dense and there is no empty drum phenomenon. The more dense the gypsum board is, the more durable.
Second, tapping by hand
Check the elasticity of the gypsum board. By tapping with a hand, a very solid sound is given to indicate that the gypsum board is durable and durable. For example, a sound that is very empty indicates that there is an empty drum in the board and the texture is not good. The weight of the gypsum board can also be measured by the weight of the handcuff.
Third, the size tolerance, flatness and right angle deviation
Dimensional tolerance, flatness and right-angle deviation should meet the eligibility criteria. If the deviation of the decorative gypsum board is too large, the decorative surface will be irregularly tidy, and the entire surface will be uneven, which will have a great influence on the decorative effect.
Fourth, look at the signs
On each package, the product name, trademark, quality grade, manufacturer's name, date of manufacture, and signs of moisture, care, and product marking should be included.
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