Mirror polishing is one of the important finishing processes that greatly affects the sharpness of the knife. The curved surface of the blade, polished to a mirror-like finish, reduces the resistance caused by friction when cutting, and maintains a smoother sharpness. The craftsman's skill shines through in the work of removing the fine grinding marks remaining on the surface caused by rough polishing, and finishing in a limited number of times while paying careful attention to the rough heat remaining on the blade caused by repeated polishing.