Homebrew PCBs

Stefan Trethan wrote:
> Now there's your problem. You don't have CuCl, you have HCl and H2O2.
> The one will keep, the other won't.
>
> You can make CuCl from HCL and H2O2 simply by etching copper, but
> until you get there you have to add H2O2 each time you want to etch.
>
>   
Ah Ha, the rejuvination process, adding H2O2 before each etching 
session, until it becomes
CuCl.  Is that the stage where the solution changes color?

Thanks guys for refreshing my ageing memory.

Wayne