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Black anodizing of titanium

I am doing some tests on anodizing titanium for decorative purpose (non-commercial). I am using a TNP solution and voltages up to 120V, getting colours from gold thru bronze to green. Where to find a list of all available colours and their approximate voltages?

Is it possible to get a black coating? Is coloring with a dye possible, or adding a second anodizing step in a tin salt solution? (I understand this is used for black anodizing aluminum.)

Erik I Olsson
- Eidsvoll, Norway

Black on anodized titanium......No.

Jon Quirt
- Fridley, Minnesota

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