Since ferric chloride is another name for iron chloride, I'm not sure how
that would work, since there is already an abundance of iron in the
solution, but I've never tried it so I'm not going to say it won't work.
However, I'd like to hear from somebody who HAS tried it, for better or for
worse.

Jim




I've also heard of putting steel wool into spent ferric chloride etchant,
which I think gets the copper out in a metallic form and probably replaces
it with iron. Whether that would be better I don't know.

Chris