from about 1% to {HEAD ~ about 20%} by {TAIL ~ weight} of an abrasive composition comprising 
by
from about 1 % to { HEAD ~ about 20 % } by { TAIL ~ weight } of an abrasive composition comprising
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH