Assertion: pen's ink | /r/HasProperty | thick
Facets:
Source sentences:
text: The ink is thick and opaque and tends to bubble on the surface before soaking in.
text: Ballpoint pens use a thick quick drying ink so that writers will not inadvertently smear their work, and the ball bearing also keeps the ink inside the cartridge moist so that it will not clog the pen.
text: Since the ink is thick, ballpoint pens use less ink as you write, lasting longer than other pen types.
text: Because the ink is thick and opaque, it shows up more clearly on slick surfaces than the typical inks used in ballpoint or felt tip pens.