It is the process of polishing the glass edges and corners. The process of sharpening the edges of the glass and corners of the edges of the process, the 90 ° and 45 ° inclination of the smooth operation of the surface finishing, the process of polishing the process of the fish ridge or C raze, the process is called the grading of the grading. Polishing is the polishing of the cutting surface which is matting after the grinding by a second process.