The Etching of Iron with Ferric Chloride Solution as a Model for a Technical and Economic Comparison of Three Spent Etchant Regeneration Systems

Photochemical machining (PCM) is a non-conventional method of manufacturing parts by employing a combination of photoresist and chemical etching techniques<ll_ It is especially economic for the production of thin, flat, complex metal parts in comparison with the rival processes of precision stamping, wire electrodischarge machining and laser beam machining(2l.