Homebrew PCBs

Hi Jim,

Are you using this at room temperature? Did you make your CuCl2 with 
H2O2/HCl? If so, what was your starting mixture? Thanks.

Mark

At 02:58 PM 5/3/2011, you wrote:
>Hi Mark
>I use 27% H2O2 bought at the pool supply store to rejuvenate my etch. I
>use ~7 ml H2O2 27% per ~300 ml of CuC12.
>I tried air bubbling and I was not satisfied. If you remember how fast
>the original etch solution using 3% H2O2 and 30% HCl , this rejuvenated
>solution is equally as fast.
>I air bubbled for TWO weeks and the resulting etch was VERY SLOW
>compared to the ~7ml of 27% H2O2 rejuvenated etch.
>Jim KI6MZ
>
>On 5/3/2011 5:30 AM, Mark Lerman wrote:
> >    If I add 3% H2O2 to regenerate my etchant, I'm adding a lot of
> > water to the mix, so I'm wondering if there's any advantage or
> > disadvantage in bubbling oxygen rather than air through CuCl2 etching
> > solution? Or does the air itself regenerate the solutionadequately in
> > addition to agitating it?
> >
> > Mark
> >
> >
> >
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