this post was submitted on 21 Mar 2024
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Can’t you also get this color from titanium?
That was my first thought. It shouldn't be too hard to expose different areas to the electrolyte for a time and do a different voltage for each.
Haven't seen that, though. And the choice of colours isn't quite arbitrary, but it should be possible to do some things.
You can, but it's way more expensive and uncommon, so I just assume it was made the cheap way