If you’ve done any PCB etching at home, chances are pretty good that you’ve at least tried the old standby, ferric chloride. It’s cheap and easy, and has a lot of advantages over other wet ...

Another common etchant is ammonium or sodium persulphate ... He also used the same materials (along with some others) to make ferric chloride successfully. Even then, it is a good example of ...

ferric chloride, 2 ml. concentrated hydrochloric acid and 99 ml. methyl alcohol) etching for 20–60 min., revealed cracking as the principal deformation mechanism and twinning as the secondary ...