Titanium anodization color spectrum - photo

Titanium anodization color spectrum.

Fullsize image: https://diqn32j8nouaz.cloudfront.net...m_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...r_spectrum.jpg


Previously:

https://www.homemadetools.net/forum/...354#post116580
https://www.homemadetools.net/forum/...568#post197364
https://www.homemadetools.net/forum/...905#post194602
https://www.homemadetools.net/forum/...081#post138069
https://www.homemadetools.net/forum/...241#post196020

It's very interesting that it goes gold -> blue -> gold -> blue -> gold. It's super obvious we're just cycling through wavelengths as the oxide layer grows in thickness. Extremely cool.

MrTitanium.com How Titanium colors work without dye?

I'm not 100% convinced of this explanation because I believe that should cause the colour to change based on the viewing angle. But I think it's mostly right.