The amount of additive initially used was 1.25 g tolyltriazole in {TAIL ~ 50 ml isopropyl alcohol} per liter of {HEAD ~ etchant} 
The amount of additive initially used was 1.25 g tolyltriazole in { TAIL ~ 50 ml isopropyl alcohol } per liter of { HEAD ~ etchant }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD