Unless you use a mill, you are probably using a chemical bath of some sort to strip copper from your boards. The standard go-to solution is ferric chloride. It isn’t too tricky to use ...

A fair warning however, standard ferric chloride disposal procedures need to be followed when using this solution. If you want to know what he concocted in his kitchen as well as the chemistry ...

Compounds with a phenol group will form a blue, violet, purple, green, or red-brown color upon addition of aqueous ferric chloride. This reaction can be used as a test for phenol groups. Mix several ...