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