Assertion: lamp's use | /r/CapableOf | allow more control
Facets:
value: over the flame
type: OTHER
Source sentences:
text: In addition to producing a hotter flame, the use of pure oxygen allows more control over the flame's oxidizing or reducing properties, which is necessary because some coloring chemicals in borosilicate glass react with any remaining oxygen in the flame either to produce the desired final color or to discolor if extra oxygen is present.