Homebrew PCBs

I may not have all the specifics right - it was about 6 months ago but
I did add 50 mL of 30% HCl and then aerated.  It stayed a dull green,
even after a week of aerating.  50 mL of 35% H2O2 brightened it to
emerald green and I was able to etch a board with it.  Total volume
was 2L + 100 mL.  I'm sure I was doing something wrong but I just
wanted to etch boards not fiddle f*rt around with chemicals. 

I love AP.  Its clear, clean, fast, reliable and very easy to use. 
Never had to fuss with it.  It just works. 

I still have 2.1 L of mystery etchant if some one wants it...  heh heh heh

--- In Homebrew_PCBs@yahoogroups.com, Adam Seychell <a_seychell@y...>
wrote:
> Are you sure you added enough acid *before* aerating ? How do you know 
> what the acid concentration was after aerating ?
> 
> I find it hard to believe it wouldn't oxidize in that time.
> I assume you are looking for the transparent green color to
determine if 
> the bath regeneration was completed.
> 
> Adam
> 
> Phil wrote:
> > 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
> > 
> > 
> > 
> > 
> > 
> > 
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and Photos:
> > http://groups.yahoo.com/group/Homebrew_PCBs
> > 
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> > 
> > 
> > 
> >  
> > 
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> > 
> >