Make Copper Chloride PCB Etchant

[@StephenMortimer]

You are a delight for an old guy (VERY old) to listen to ... hope your Mom enjoys you as much

[@Berghiker]

How well does copper II chloride etchant work? I made some with 30% H2O2 and it is very dark green.

[@arctic_otter]

That just means it is really saturated. The stronger H2O2 allowed more oxygen into the reaction. It will still work though.

[@Berghiker]

That is copper, not copper oxide.

[@bitsofeverything8385]

I'm pretty sure he meant the patina.

[@xavieraxiak6866]

You should have put some effort into producing audio that is not so horribly distorted.