Stefan Trethan <
stefan_trethan@...> writes:
> I'm not sure about that.
> The CuCl is just sitting there, waiting for me to drop in a board all
> year round. It doesn't go bad or require me to mix up a new batch.
> Maintainance is minimal, and can be done while the board is etching
> which is efficient use of time.
>
> I can still see through my CuCl with a bright light from the other
> side, but now the tank is positioned inconveniently for that and I
> lift the board out for final inspection.
Mine is in the same state, but I still check the pH and specific
gravity once in a while, and occasionally add more HCl.