Assertion: calcium carbonate | /r/HasAspect | high brightness
Facets:
value: for resistance to weathering
type: PURPOSE
value: for high purity
type: CAUSE
value: for tio2 extension
type: PURPOSE
value: for low abrasiveness
type: PURPOSE
Source sentences:
text: Ground natural calcium carbonate is the most generally used white pigment in paints because it is available at fairly low cost and has high brightness for TiO2 extension, high purity, low abrasiveness, and resistance to weathering.