PURPOSE: To reduce the surface roughness of stainless steel with a uniform surface structure, by carrying out mirror surface finishing of stainless steel with the use of a process consisting of first successive polishing steps with the use of grind stones, a second polishing step with the use of a solution of nitric acid containing chromium oxide and a third lapping step with the use of a nitric acid solution.

CONSTITUTION: The surface of stainless steel W is subjected to mirrored-surface-finishing with the use of a process consisting of first successive polishing steps with the use of grindstones 20' having grain sizes of 600W1,200, a second polishing step with the use of a first solution containing 2.5W3.5% nitric acid and 4.5W5.5% of chromium oxide powder at a temperature of 28W32°C and also with the use of a felt or unwoven lapping material 20" and a third lapping step with the use of a second solution containing 4.5W5.5% of nitric acid together with a lapping material similar to the lapping material 20" used in the second step. Then, the structure of the finished surface may be made to be uniform having an extreme small surface roughness. Accordingly, it is possible to fabricate the outer surface of stainless steel with a high degree of accuracy, having a uniform mirror surface. Further, if the outer surface of stainless steel is colored with a coloring process, such as, for example, INCO process, an excellent colored mirror surface having an extremely small difference in color may be obtained.