Also known as ‘Cold Black Oxide’, Chemical Blacking is a cold chemical process for iron and steel.  The process is performed at room temperature and involves the auto-catalytic reaction of copper-selenide depositing on the stainless-steel surface. Applications for the chemical blacking process are in tooling and architectural finishing on steel, and creation of a patina for stainless steel.

The benefits of chemical black are:

• Aesthetically pleasing
• No dimensional change
• The post treatment provides protection against corrosion
• No distortion (unlike hot processes)