Homebrew PCBs

I tried air 'bubbling' too (with am aquarium pump) and got nothing.

Then I found this: http://www.youtube.com/watch?v=yT5SdY7nlu8

I think you really need something like that, if you want to go with air regeneration.


--- In Homebrew_PCBs@yahoogroups.com, Jim <jhutch17@...> 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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