Homebrew PCBs

"Herbert E. Plett" <cachureos@...> writes:
> perhaps a little more HCl is needed, it also fumes out...

Follow-up:

CuCl concentration is below 1.2 (which I figured).

Acid seems high enough.  I heated some copper wire to get Copper
Oxides, and the etchant dissolved that just fine, leaving a bright
pinkish copper behind.  I did that a few times to get more copper into
the tank, and then left the wire in there.  Perhaps by the time I get
around to fiddling with it again it will be more usable, otherwise
I'll put in more H2O2.

I did make up some NaOH solution for titration but it neeeds time to
fully dissolve.