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