How to avoid scratches during the grinding process of white corundum

How to avoid scratches during the grinding process of white corundum
The main component of white corundum is, because of its high hardness, it is often used for polishing and grinding
However, customers often say that the white corundum powder before use has scratches during use. So is the cause of the scratches the flat plate?
The cause of scratches is generally that white corundum powder contains large particles, which cause scratches on the workpiece.
How to avoid such problems from happening
1. Choose a strong white corundum manufacturer
2. Choose white corundum with moisture content. The particle size of moisture-rich white corundum is concentrated and it is difficult to have large particles.