Homebrew PCBs

2/3 peroxide lets me think this was low concentration medical stuff.
With that there is almost no way to continue using the etchant, since
it adds too much water.

Other than that, the etchant should just keep right on working when
H2O2 (and HCl) is added.
If you can get higher concentration H2O2 (>20%) there is no need to
throw it away.

ST


On Mon, Jun 30, 2008 at 9:13 PM, Jim Klitzing <wb6myc@...> wrote:
> OK, I made up some of this stuff...2/3 peroxide and 1/3 acid, and it
> worked fine the first time. Nice light green color when done, so I set
> it aside in a sealed container for next time. 2 days later, I went to
> etch again, and the stuff is dead. Peroxide doesn't reactivate it, and
> the color is still light green. What am I missing?
>
> thanks, Jim
>
>
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