Although both pigmentary and {TAIL ~ nano ZnO} show {HEAD ~ improvements} in tint strength ; the nano ZnO particle effect is more efficient 
Although both pigmentary and { TAIL ~ nano ZnO } show { HEAD ~ improvements } in tint strength ; the nano ZnO particle effect is more efficient
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH