Homebrew PCBs

"Leon" <leon355@...> writes:
> You can regenerate FeCl3 with H2O2 and HCl. The copper content will
> become CuCl2, so you end up with both etchants.

Interesting.  Where does the iron go?  Back to solution?

However, CuCl regenerates with air, and "brown stains suck".  Plus,
you can buy HCl and H2O2 cheaply, whereas FeCl is getting harder to
find locally and more expensive.