Assertion: titanium dioxide | /r/HasProperty | effective at blocking uv-light
Facets:
value: very
type: DEGREE
Source sentences:
text: Because zinc oxide and titanium dioxide are very effective at blocking UV-light, these are largely used in sunscreens but the fact that their common forms (i.e. particles in the micrometre range) have a white colour made them less appealing to customers for application on skin.