First, perform a visual inspection. When examining the front side of the board, it should be done under bright lighting conditions at a distance of 0.5 meters. Start by checking the surface for smoothness, ensuring there are no pores, stains, cracks, chipped edges, color inconsistencies, or incomplete patterns. The two layers of protective paper on the top surface of the gypsum board should be firmly attached to prevent damage or cracking when screws are inserted. Additionally, inspect the sides to confirm that the gypsum texture is dense and free from any hollow drumming sounds, which could indicate poor quality. A denser board typically means better durability.
Second, use your hands to tap the board. This test helps determine the board's density and structural integrity. A solid, clear sound suggests a well-constructed and durable board. In contrast, a hollow or empty sound may indicate internal voids or weak spots, which can affect the board’s strength. You can also estimate the weight of the board by lifting it—lightweight boards might not be as strong or reliable.
Third, check the dimensional accuracy, flatness, and right-angle deviation. These measurements must meet industry standards to ensure proper installation and aesthetic appeal. If the board has significant deviations in size or shape, it may lead to an uneven or messy appearance when installed, greatly affecting the overall finish of the project.
Fourth, examine the product labeling. Each package should clearly display the product name, trademark, quality grade, manufacturer’s information, production date, and necessary warnings such as moisture protection, handling instructions, and product markings. Proper labeling ensures you are getting a genuine and high-quality product that meets safety and performance standards.
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