Polished finish
No. 3: Expressed by 3A and 3B. 3A: The surface is uniformly ground, and the abrasive particle size is 80-100. 3B: Wool surface polishing, the surface has uniform straight lines, usually polished at one time on 2A or 2B board with a size 180-200 abrasive belt.
No.4: Unidirectional surface treatment, not strong reflectivity, this surface treatment is probably the most widely used in construction applications. The process is first polished with a coarse abrasive and then ground with a grit size of 180.
No.6: A further improvement of No.4 is the use of Tampico polishing brushes to polish the No.4 surface in abrasive and oily media. No surface treatment is done in British Standard 1449, but can be found in American standards.
No.7: Known as bright polishing, it is the polishing of surfaces that have been worn but still worn. A 2A or 2B plate is usually used, with a fiber or cloth polishing wheel and a corresponding polishing paste.
No.8: Mirror polished surfaces with high reflectivity are often referred to as mirror finishes because they reflect clear images. Continuous polishing of stainless steel with fine abrasives followed by polishing with an extremely fine polishing paste. It should be noted that in architectural applications, this surface can leave fingerprints when used in places with high foot traffic or where people touch them frequently. Mudras can be removed, but sometimes they are beautiful.