Assertion: linseed's oil | /r/HasProperty | exposed to air
Facets:
Source sentences:
text: Non-drying oils don’t harden or polymerize when exposed to air.
text: It may surprise you that all oils used for oil painting (including linseed, which is most commonly used), can start to turn rancid when exposed to air.
text: When exposed to air, oils do not undergo the same evaporation process that water does.