Mirror polish finishing.
Coarse polishing: Use grinding wheels and pass the stainless steel plates through six sets of grinding machines in a sequence from coarse to fine. The main purpose is to remove roughness, burrs, and sand holes on the surface to achieve a certain degree of luminosity. 
Fine polishing: Use mechanical wool felts and pass through ten sets of grinding machines.Hand grinding. The main purpose is to remove the oxide layer, sand holes, and coarse grinding marks on the surface, and improve the luminosity of the stainless steel plate to reveal details. 

What is mirror finish sheet ？
Mirror finish sheet is also named mirror-polished stainless steel sheet, which is processed with a non-directional and high-gloss polished #8 finish to remove the scratches, grooves, or dents on the surface, which can make It like a super reflective mirror, and it doesn't need any finishing or coating material to assist the process.