The number of meshes in stainless steel wire mesh is the number of holes, which is the number of holes per square inch. The larger the mesh size, the smaller the aperture.

 

In general, the number of meshes × aperture (microns) = 15,000.

 

For example, a 400 mesh screen has a pore size of about 38 microns; a 500 mesh screen has a pore size of about 30 microns. Due to the problem of open cell rate, which is because of the difference in the thickness of the wire used in the weaving of the net, the standards of different countries are different. There are currently three types of American standards, British standards and Japanese standards, of which the United Kingdom and the United States are similar. Japan has a big difference. China uses American standards, which can be calculated using the formula given above.

 

It can be seen from this definition that the size of the mesh determines the size of the wire mesh aperture. The size of the screen pore size determines the maximum particle Dmax of the sieved powder.

 

Therefore, we can see that the 400-mesh polishing powder is completely fine, such as only 1-2 microns, and it is entirely possible to be 10 microns, 20 microns. Because the mesh has a pore size of about 38 microns.

 

Our D50 for 400 mesh polishing powders is 20 microns. The photo of the polishing powder is given in the drawing, and the scale is 50 microns.