How to choose the mesh of water sandpaper?

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How to choose the mesh of water sandpaper?
It is necessary to first look at the material of the workpiece and the smoothness of the surface of the workpiece, so as to achieve the desired degree of polishing. For example, when grinding wood, leather and other fibrous materials, it is difficult to achieve a very high mesh, so when choosing the mesh of water sandpaper, you can start directly from about 200 mesh, and end with 800 to 1000 mesh.

For example, when polishing wood and leather, it is necessary to ensure that the original material is tight and contains oil and wax, then it is necessary to use high-mesh water sandpaper, use smooth and hard surfaces such as glass, hardwood, brass, etc., dipped in chemical fillers to bond the fibers. , it can be further polished.

For grinding metal workpieces, you can start with 80-grit water sandpaper, multiplying by 2 each time, and the grinding effect is good when it reaches about 1500-grit.

For metal polishing with a higher mesh, 3000 or 5000 mesh water sandpaper can be further used, but the effect is very small. At this time, polishing paste should be used, and a clean cloth, paper, etc. should be dipped and wiped, or a wool wheel should be used. Using chemical polish, the effect can reach a mirror surface, the only bad thing is that it is not good for personal health.