Lapping principle
 
Polishing is the relatively soft or elastic deformation properties of the polishing cloth, but only in very small plastic deformation amount of surface material removed, in order to achieve low distortion mirror and processing project.
 
Maintaining the polishing or grinding shape accuracy of the resulting works, side to improve the surface quality can be said that the main purpose of polishing.
 
Polishing removal unit is very small, so the low processing efficiency, and because the use of easily deformable polishing machine, it is prone to collapse in shape works. So as far as possible in the construction with less removal to achieve a mirror.