Assertion: calcium carbonate | /r/ObjectUse | used marble
Facets:
value: in particular matte emulsion paint
type: LOCATION
value: widely
type: DEGREE
value: as an extender in paints
type: PURPOSE
Source sentences:
text: Calcium carbonate is widely used as an extender in paints, in particular matte emulsion paint where typically 30% by weight of the paint is either chalk or marble.