Homebrew_PCBs

sir_tancred wrote:

> I'm a bit curious. I've read online about Photo Etch setups, and one
> thing that seems popular is an acid solution that grows as you use
> it, basically it uses chemicals that will combine with the copper to
> create more acid each time you etch.
>
> What I'm curious is if there is a similiar etching solution that
> could be used for Brass? Since I'm interested in photo etching from
> a modellers perspective, I'd rather use cheaper brass. :-)

I've tried etching thin copper and brass shim with ferric chloride and
found it's a *lot* harder than the copper on pcb. Think its got something
to do with the phosphorous content in pcb copper.