Homebrew PCBs

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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