Good Heavens!
The brew is so inexpensive, why try to save it?
After etching the PCB, just neutralize the brew with sodium bicarbonate
and flush it down the drain.
Mix just enough to do a one-shot etch. Use a fresh brew for each job,
unless you are etching several small boards in succession.
Roland F. Harriston, PD
Jim Klitzing 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
>
>