Material identification is fundamental to quality assessment. High-quality metal mesh must first be made from compliant raw materials. This can be initially determined through visual inspection and simple testing: Mesh made from high-quality steel has a smooth, crack-free surface and uniform color. When lightly touched with a magnet, low-carbon steel mesh exhibits strong magnetism, while stainless steel mesh (such as 304 and 316) exhibits weak or no magnetism. If stainless steel mesh is advertised as highly magnetic, it may be adulterated. Using a vernier caliper to measure wire diameter, the wire diameter tolerance for high-quality mesh should be within ±0.05mm. Substandard products often reduce wire diameter to reduce costs, resulting in significant deviations between actual measurements and the stated values. A construction project once purchased protective mesh with insufficient wire diameter. The mesh broke shortly after installation. Later testing revealed that the wire diameter was 0.3mm thinner than stated, resulting in a 40% reduction in load-bearing capacity, necessitating complete replacement.

Details in craftsmanship differentiate quality. Processing is a key indicator of quality, focusing on mesh accuracy and welding/weaving quality. High-quality metal mesh features uniform mesh size. When measuring any 10 adjacent meshes with a ruler, the error should be ≤1mm, and the mesh surface should be smooth and free of noticeable bumps. Welded mesh features firm, full welds, free of cold or leaky solder joints. Gently prying the welds together will reveal that high-quality products will not experience loosening or loosening. However, low-quality mesh often suffers from cracked welds due to unstable welding current, or even from glued-on joints that appear welded. Woven mesh (such as crimped wire mesh and Dutch wire mesh) features tightly interwoven warp and weft threads, seamless knots, and smooth, burr-free edges. Low-quality products can exhibit issues like skewed mesh and sharp edges, which not only affect aesthetics but also pose safety risks.

Performance testing verifies practical value. Actual performance testing can further verify the quality of the mesh, which can be judged through simple operations: in the load-bearing test, the weight is evenly placed in the center of the mesh. High-quality mesh has small deflection and fast rebound, and there is no permanent deformation after unloading. Inferior mesh is prone to obvious bending or even breaking. The corrosion resistance test can be simply tested with salt water spray. The mesh is immersed in 5% concentration salt water and then taken out after 24 hours. High-quality galvanized mesh has no obvious rust on the surface, only slight discoloration, while mesh with unqualified coating will have large areas of rust spots. For filtration mesh, the filtration effect can be observed through water flow test. High-quality mesh filters evenly without impurity leakage, and the mesh clogging rate is low. Inferior products may fail to filter due to uneven mesh.