Homebrew PCBs

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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