I tried to use CuCl over a period of 4 months. I was never able to
regenerate it using a bubbler - even left it running for a week once.
I added more acid but no regen. However, adding H2O2 made a huge
difference. My bubbles were fairly small so I think I was getting O2
into it. I suspect there is more to it than just pumping oxygen into
the solution.
--- In Homebrew_PCBs@yahoogroups.com, "stan4312" <stanman@t...> wrote:
> I'm attempting to bootstrap my first batch of CuCl as I type, so
> this page is fresh off my bookmarks:
> http://pacificsun.ca/~robert/pcb/cucl.htm Pretty good
> page on CuCl. Lots of precision chemistry.
>
> I thought he also had the following seat-of-the-pants advice: if it
> hasn't regenerated overnight, add more acid, but glancing back, I
> see it must have been from somewhere else.
>
> Stan
>
> --- In Homebrew_PCBs@yahoogroups.com, "johnwhitneyfiat"
> <johnwhitneyfiat@y...> wrote:
> > I have been off the group for a while and I'm sure this was
> covered.
> > In the direction for making etchant from Hydrogen Peroxide and
> Muratic
> > Acid, it says that you can regenerate with a bubbler. How long
> does
> > this take? I know it will depend on the amount and the area that
> was
> > etched, but is there a rule of thumb to make it work. I do have to
> day
> > that I make a small bathch and it worked great on a sample board.
> >
> > John Whitney
> > Wis X 1/9