Ingredients for your own home copper etching tank
Muriatic Acid (Hydrochloric or “Pool” acid)
Hydrogen Peroxide (some people use the hair-bleach strength, I just use the drugstore strength)
A glass container large enough for your work with a cover (I use an old casserole dish with its own glass lid)
Tongs/gloves/something to pick stuff up with
Mix 2 parts hydrogen peroxide to one part acid [...]