Assertion: borax | /r/ObjectUse | used as flux
Facets:
value: for forge welding
type: PURPOSE
value: often
type: TEMPORAL
Source sentences:
text: Borax is often used as a flux for forge welding.
text: Borax is often used as a flux for forge welding.
text: It could be used as a flux to reduce the melting point of various metal ores, converting them into a slag from which the precious metals could be separated (Austin, The fire assay of gold, silver and lead in ores and metallurgical products 40).