Assertion: pen's ink | /r/HasProperty | water-based
Facets:
value: water
type: OTHER
Source sentences:
text: Gel pens also contain a water-based ink, but this ink is pigment-based, rather than dye-based, so the consistency is slightly thicker than rollerball-pen ink.
text: Ink for drawing pens is water-based and contains dye rather than pigment for color.
text: The inks used in fountain pens are water-based, but there are many different kinds and qualities.
text: Rollerball pens contain water-based ink, which allows them to glide far more smoothly over the page.