But, at most, this should result in {HEAD ~ a carbon content} of {TAIL ~ 0.06 percent} by weight in the powder mixture 
of
But , at most , this should result in { HEAD ~ a carbon content } of { TAIL ~ 0.06 percent } by weight in the powder mixture
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH