Here’s two hacks to etch your own boards at home in just a few ... and go at it with a clothes iron. This takes a heck of a lot of time and effort, but [Dustin] found another way.

The iron carbide studies, made with Carapella's reagent (5 gm. ferric chloride, 2 ml. concentrated hydrochloric acid and 99 ml. methyl alcohol) etching for 20–60 min., revealed cracking as the ...

4) The copper (II) and iron (II) ions in solution are then ... the presence of chloride ions from hydrochloric acid effectively resets the etching solution, restoring the cupric chloride and ...