Assertion: water soluble ink | /r/ObjectUse | used on normal-weight paper
Facets:
Source sentences:
text: Other companies began marketing pens containing water-soluble inks that could be used on normal-weight paper (Rosenthal's invention required heavier paper to keep the ink from soaking straight through to the underlying surface) and with capillary flow technology, which enhanced the movement of the ink into the tip of the writing utensil.