Homebrew PCBs

On Wed, 12 May 2004 11:04:54 +0200, Stefan Trethan <stefan_trethan@...> 
wrote:

> Strange question, i know..
>
> any ideas how to chemically blacken the copper on a pcb (copper only, not
> epoxy).
>

found something:

<http://www.cpachem.com/en/madchem/06.htm>

Have no sodium thiosulfate at hand, but did read somewhere else
it might work with sulphur, have enough sulphur so i will try....

suggestions welcome.

(It could be used for heatsinks etc...)

ST