Assertion: fabric | /r/HasProperty | weakened by light
Facets:
value: in some cases
type: TEMPORAL
Source sentences:
text: In some cases, the textiles are weakened not by outside causes such as light or pests, but by chemical reactions taking place within the fabric itself, such as the oxidation of iron-based mordants over time, which can cause darkening and discolouration in the surrounding fibres.