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