said proportion includes a proportion in {HEAD ~ the range} of 15% glass and {TAIL ~ talc} 
said proportion includes a proportion in { HEAD ~ the range } of 15 % glass and { TAIL ~ talc }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL