including the messy old standby etchant ferric chloride, or even [Sebastian]’s preferred sodium persulfate method. Being out of that etchant, he decided to give the acid-peroxide method a go and ...

ferric chloride, 2 ml. concentrated hydrochloric ... These observations were made upon a carburized plain carbon steel, upon a carburized ‘Westinghouse Puron’ iron (spectrographically pure ...

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 ...