There may be geometrical deficiencies, scratches or other imperfections on ground surfaces. In some cases, these imperfections must be fixed, and the surface integrity must be achieved by eliminating surface tensions.

The processes to improve the surface roughness quality and dimensional precision using special abrasive materials include honing, fine surface grinding, lapping and polishing.

Fine Grinding (Polish Grinding) is an advanced surface process, which is performed only if a superior surface quality is required after the surface grinding process. Therefore, the quality of the mirror polished surface is directly related to the quality of the grinding process. And the surface quality is quantified by surface roughness measurements (Ra, Rz, Rt, Rmax).