The present invention is concerned with a method of regeneration of {HEAD ~ spent etching solutions} containing cupric chloride and a metal chloride: cuprous chloride or {TAIL ~ ferrous chloride} 
containing
The present invention is concerned with a method of regeneration of { HEAD ~ spent etching solutions } containing cupric chloride and a metal chloride : cuprous chloride or { TAIL ~ ferrous chloride }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL