"rickwendel763242" <
rickwendel763242@...> writes:
> Muriatic Acid (28%) and Hydrogen Peroxid (3%)? Homemade stuff.
> Ferric Chloride?
I've used both of these. Started with FeCl, switched to CuCl (made
from HCl+H2O2). Why? First, FeCl is getting hard to find locally.
Second, FeCl stains. Third, CuCl can be air regenerated, so there's
less to throw away over time.
Neither of those are see-through, but I do put a strong light behind
the tank and can see enough. I usually remove the board, rinse, and
inspect with a mag visor anyway.