from about 75% to about 90% by weight of {HEAD ~ a mixture} of at least two abrasive powders comprising at least 50% by {TAIL ~ weight} of calcium carbonate 
from about 75 % to about 90 % by weight of { HEAD ~ a mixture } of at least two abrasive powders comprising at least 50 % by { TAIL ~ weight } of calcium carbonate
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH