These profiles are taken through a special surface treatment module to attain the ideal surface finishing. It varies based on user preference and actual setting of the windows and doors.
The surface of the wood grain finish should be smooth and flat, and no obvious inclusions. The wood pattern is clear and there is no obvious leakage and crease. However, creases and no wood grain patterns are allowed at the corners and grooves. If the wood grain pattern is ghosted or blurred, the finish is unqualified.