02/10/2025 – Surface treatment
Stains on copper wire
For copper and copper alloy wire products, the surface quality is usually very important. Many types of surface defects may occur, and a particular set of defects are the so-called stains, discoloration spots or a discoloration of part of the wire surface.

The appearance of stains may become visible at a different, later stage in the production than where the defect had occurred. © Q8Oils