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