Homebrew PCBs

On 01/01/16 12:57, MIKE DURKIN Patriot121@... [Homebrew_PCBs] wrote:
>
> works for me ...
>
> What kind of acid ?
>
> I only have Ferric Chloride .... if had it for over 25years. One bottle iv never
> opened.

If you use it and use bubble agitation, keep it stored for next time, and top up 
with a bit of HCl hydrochloric or muriatic acid next time it's used. It'll 
convert to copper chloride etchant and last many dozens of uses, like years 
worth. I have mine diluted 1:1 with water which works well. Keep the container 
covered when not in use, to prevent HCl vapour from making things rust.