Assertion: poor quality petrolatum | /r/MadeOf | tar impurities
Facets:
Source sentences:
text: Poor quality petrolatum may indeed contain tar impurities and tar is a known comedogen, however, cosmetic grade petrolatum is devoid of tar impurities and does not cause comedone formation.
text: Poor quality petrolatum may indeed contain tar impurities and tar is a known comedogen, however, cosmetic grade petrolatum is devoid of tar impurities and does not cause comedone formation.