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