As for "dyes", they will come off in normal wear- I'm not certain
where you got that as a rectifier is the way to go for
Hmmm, at least one of us is confused.
I deal with Reactive Metals Studio (and with reactive metals) quite
a bit, and while it would not surprise me if Bill Seeley knows all
there is to know about anodizing aluminum, I don’t believe it is
touched on in his catalog.
Anodizing aluminum, as I understand it (I haven’t done it) involves
running current through the aluminum, which somehow makes the
surface receptive to dye. It can wear off, but it is quite durable
(remember those lovely tumblers from the 50’s? I’m always tempted to
buy them in “antique” malls-- they remind me of summer in Florida
and iced tea).
Titanium and niobium, on the other hand, turn colors in response to
voltage, without benefit of dye. The science of it is touched on in
my article in the last Art Jewelry. There is no actual pigment
present at all. This, too, can wear off, as it is a thin surface
Aluminum can accept any color, in any order. Reactive metals have
their own agenda and one must accept their limitations. Anodized
niobium, though, will change color when bent, which can yield some
pretty cool results.
Anyway, coloring aluminum is a subject that I don’t recall ever
seeing before on Orchid.