Homebrew PCBs

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