S
Spehro Pefhany
- Jan 1, 1970
- 0
That is not anodizing. That is referred to as "chem-etch", or
"chem-film". Some versions have the appearance of an anodized piece.
Unless externally applied electric currents are involved, it is not
anodizing.
Err..of course the process involves externally applied currents, or it
would not be anodizing.
You prepare the surface and clean the part very well, anodize in an
electrolyte solution (the part to be anodized is, not surprisingly,
the positive side, and something like lead is the negative),
neutralize and rinse, then dye (if desired), and the pores are sealed
with another chemical in boiling water.
Some of the parts done in a home shop look pretty darn good- I
recently handled a telescope that a fellow made accessories for (in
preparation to chasing a solar eclipse into some gawdfersaken bit of
the globe) and it really looked professional. He told me he used an
pro aniline dye, but fabric dyes (eg. Rit) can work too.
Best regards,
Spehro Pefhany