Glass and {HEAD ~ glass} are blended at {TAIL ~ a weight ratio} of 10:90 to 90:10 in such a manner that the weight average CTE of the blended glasses is equal to or approximately equal to the CTE of the substrate 
Glass and { HEAD ~ glass } are blended at { TAIL ~ a weight ratio } of 10:90 to 90:10 in such a manner that the weight average CTE of the blended glasses is equal to or approximately equal to the CTE of the substrate
OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL 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 OTH OTH OTH OTH OTH OTH OTH OTH