{HEAD ~ The amount} of {TAIL ~ burn} chemical often ranges from about 1 percent to about 15 percent, preferably about 5 to about 10 percent, based on the total weight of the formulation 
of
{ HEAD ~ The amount } of { TAIL ~ burn } chemical often ranges from about 1 percent to about 15 percent , preferably about 5 to about 10 percent , based on the total weight of the formulation
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL 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