Assertion: cardboard | /r/HasProperty | porous
Facets:
Source sentences:
text: Since paper and cardboard are porous, they carry the lowest potency for the shortest period of time.
text: However, cardboard is a porous material and therefore for specific applications such as those for electrical wiring or food processing, layers of non-porous material may need to be added to the interior or exterior of the tube as a barrier against moisture.