Surface brushing is a post-treatment means to form cord design on the surface of articles by grinding to the decorative effect, which may embody the texture of metallic materials. This process is usually used for the production of a variety of logos on the panel of household appliances, the peripheral and panel of various digital products, and the panel of notebooks. The commonly used materials are at the thickness of 0.125, 0.175, 0.254, 0.38, 0.5, 0.8, or 1.0mm, with the transmittance of 90%.