Does anyone know how to "blue" or blacken stainless steel? I know that from a cold chemical standpoint a mixture of Selenium Dioxides and Copper Sulfate is the standard "cold blue" formula for carbon steel....but how does one darken stainless? With chromium in the steel the copper method seems useless and an acid preferable....has anyone used chemical methods in stainless with success? What works?
- posted
20 years ago