allowing the second reagent to be absorbed through the top layer of the pad to activate the first reagent by flowing through the rupturable seal after breaking to form {HEAD ~ an activated chemical test pad} in {TAIL ~ the sealed package} 
allowing the second reagent to be absorbed through the top layer of the pad to activate the first reagent by flowing through the rupturable seal after breaking to form { HEAD ~ an activated chemical test pad } in { TAIL ~ the sealed package }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL