Assertion: fountain pen's ink | /r/HasProperty | true solutions
Facets:
Source sentences:
text: In general, any of the nanoparticle inks can be considered safe for fountain pens, but I rate them as medium-to-high-maintenance inks because of the need for more frequent flushing; the very existence of particulate matter brings with it more risk of clogging than is present with inks that are true solutions.