Assertion: boron | /r/AtLocation | glass
Facets:
value: as borax pentahydrate
type: MANNER
value: as boron oxide
type: MANNER
value: to influence fluxing qualities
type: PURPOSE
value: to increase its resistance
type: PURPOSE
Source sentences:
text: Boron is added to glass to increase its resistance to heat shock.
text: Boron is added to the glass as borax pentahydrate or boron oxide, to influence the strength or fluxing qualities of the glass fibers.