Abrasives abrasive, brush material

To clean before the board face and brush copper surface grinding all kinds of used materials, such as polymer nonwoven fabric, nonwoven or mixed with silicon carbide, or the sand of various materials, free and Pumice (Pumice Slurry) are referred to as Abrasives. However, this mixed with coated sand brush material, the powder will often be implanted in the copper surface, resulting in subsequent light resistance layer or coating adhesion and solder problems.