What effect do the large particles in white corundum powder have on the workpiece being ground?

What effect do the large particles in white corundum powder have on the workpiece being ground?
The main function of white corundum micro powder is grinding and polishing, so the particle size of white corundum micro powder is required, because once large particles appear in white corundum micro powder, white corundum micro powder can easily cause scratches and scratches on the surface of the workpiece. Products from the grinding or polishing process. , thus causing the workpiece to be scrapped and causing losses to the customer.
How to control the particle size of white corundum micro powder now? First, use water-based white corundum. The particle size of water-based white corundum is relatively concentrated and large particles are unlikely to occur.
Secondly, white corundum avoids contamination during the precipitation process.
Finally, sieve after sieving to remove large particles.