The so-called mesh size refers to the particle size or fineness of the material, which is generally defined as the size within 1 inch × The number of mesh in an area of 1 inch, that is, the number of mesh of the screen, is defined as the number of mesh through which the material can pass: for example, 200 mesh, that is, the material can pass through 1 inch × A screen with 200 meshes in 1 inch. By analogy, the larger the number of mesh, the finer the particle size of the material; the smaller the number of mesh, the larger the particle size of the material& nbsp;

Standard mesh of mesh size;

4.75mm 4 

4.00mm 5 

3.35mm 6 

2.80mm 7 

2.36mm 8 

2.00mm 10 

1.70mm 12 

1.40mm 14 

1.18mm 16 

1.00mm 18 

0.850mm 20 

0.710mm 25 

0.600mm 30 

0.500mm 35 

0.425mm 40 

0.355mm 45 

0.300mm 50 

0.250mm 60 

0.212mm 70 

0.180mm 80 

0.150mm 100 

0.125mm 120 

0.106mm 140 

0.090mm 170 

0.0750mm 200 

0.0630mm 230 

0.0530mm 270 

0.0450mm 325 

Generally speaking, mesh × Pore size (microns) = 15000. For example, the aperture of the 400 mesh screen is about 38 microns; The pore size of the 500 mesh screen is about 30 microns