Assertion: fountain pen's nib | /r/ObjectUse | used for precise emphasis
Facets:
Source sentences:
text: Broader nibs are used for less precise emphasis, with the benefit of a greater level of ink shading, a property wherein ink pools in parts of a stroke to cause variations in color and/or sheen, a property where dyes in ink crystallize on a page instead of absorbing into the paper, which leads to a different color being seen due to thin film interference, on less absorbent paper.
text: Broader nibs are used for less precise emphasis, with the benefit of a greater level of ink shading and/or sheen on less absorbent paper.