Anodizing is an electrochemical process some jewelers use to change the color of metals such as titanium, aluminum, and niobium. Dipping a reactive metal into a "bath" mixture of low-sudsing ...

Anodizing in an electrolytic cell creates a ... leading to the bright colors you often see on anodized pieces. In this process, the lye is used to strip the surface. Then it’s on to anodization ...

It seems the process is not overly difficult or dangerous ... and blue based on a voltage range of about 100V to 20V. This is one of two anodizing methods shown. the other uses a foam brush ...