Assertion: black ink | /r/CapableOf | continue to be the standard
Facets:
value: for newspapers
type: OTHER
value: for printing books
type: PURPOSE
value: for documents
type: OTHER
value: because of its contrast
type: CAUSE
value: because of clarity
type: CAUSE
Source sentences:
text: Because of its contrast and clarity, black ink on white paper continued to be the standard for printing books, newspapers and documents; and for the same reason black text on a white background is the most common format used on computer screens.