{HEAD ~ Glass}, alcohol and a small amount of {TAIL ~ water} are placed in a ball mill, and mixed and ground therein for about 20 hours to give an average glass particle diameter of about 1 5 μm 
{ HEAD ~ Glass } , alcohol and a small amount of { TAIL ~ water } are placed in a ball mill , and mixed and ground therein for about 20 hours to give an average glass particle diameter of about 1 5 μm
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH