Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan
<stefan_trethan@g...> wrote:

> Strange question, i know..
>
> any ideas how to chemically blacken the copper on a pcb (copper

only, not

> epoxy).
>
> For optical purposes, not electric. should be even colored.

I found something at an art store a few years ago called "Liver of
Sulphur" which I used to blacken copper for antiquing purposes.

No idea what was in it, or where I have the bottle now to check. Google.

Steve