Sure, ordering a PCB is quick, easy, and cheap, but being able to print one-offs would peg the needle on the instant gratification meter ... goes straight into a ferric chloride etching bath.

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 ...