Re: [CAD_CAM_EDM_DRO] Black Anodizing

In a message dated 09/16/2000 7:41:16 PM Hawaiian Standard Time,
scalione@... writes:

<< most engravers
paint the letters, sand the aluminum, then black anodize it.
The black dye does not stick to the paint and you are done.
Problem is he didn't know what kind of paint to use. Also,
don't they etch the surface first, and if so, what will that do
to the paint. I was thinking of using epoxy paint.

Any ideas?

Thanks
Bill >>
Bill,

You'd have to have a paint that can stand the etching and the fixing of
the anodizing? I believe they place the article in boiling water to seal the
dye pigment into the anodized surface.

If you paint the whole surface white, then maybe the slight "stain" won't
be noticable. I saw an engraver pour solvent into an old telephone book. He'd
open it to the first page and rub the engraved article on it. The dried paint
in the grooves didn't melt since the solvent doesn't reach into the grooves.
When the page was loaded with disolved paint, he tore off a page and
proceeded to rub the article on the next page. After a few minutes and a few
pages, the article would be clean. I thought that was pretty slick. You
gotta make sure the pages are not so wet as to melt paint in the grooves.

Peter
THRD, Inc.