Homebrew PCBs

On Fri, 02 Sep 2005 02:07:31 +0200, johnwhitneyfiat  
<johnwhitneyfiat@...> 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


I personally never tried it, but i would say many hours, perhaps days.
My tank volume isn't that large, and that means if i run out of active  
etchant halfway through a board i have to do something, waiting very long  
until it is regenerated is not an option. So i just add a small amount of  
CuCl.
With the low price of that stuff and tiny amounts required.....


ST