Should the copper workpiece be polished with white corundum or brown corundum?
Should the copper workpiece be polished with white corundum or brown corundum? White corundum and brown corundum are both common abrasives on the market. The main components are alumina powder, and the content is very high. Then the copper workpiece should be polished with white corundum or brown corundum for the matte effect of oxide