Workpieces containing {TAIL ~ copper}, in particular copper laminated printed circuit boards, are etched in {HEAD ~ an alkaline etching agent} which contains a copper tetramine complex as the active component 
Workpieces containing { TAIL ~ copper } , in particular copper laminated printed circuit boards , are etched in { HEAD ~ an alkaline etching agent } which contains a copper tetramine complex as the active component
OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH