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