The compound includes 72.5% to 77.5% by {HEAD ~ weight} of {TAIL ~ a first mixture} of substantially 18.3% Al2 O3, 29.5% Al2 SiO3 and 41.4% Na2 SiO3 particles on a weight basis 
of
The compound includes 72.5 % to 77.5 % by { HEAD ~ weight } of { TAIL ~ a first mixture } of substantially 18.3 % Al2 O3 , 29.5 % Al2 SiO3 and 41.4 % Na2 SiO3 particles on a weight basis
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH