Assertion: bleach | /r/HasProperty | bleached
Facets:
Source sentences:
text: (a) a bleaching agent is applied to the surface of the tooth or teeth to be bleached, (b) the bleaching agent is left to act on the tooth for a period of 3 to 30 minutes, (c) the bleaching agent is removed from the tooth surface, (d) steps (a) to (c) are repeated at least once.
text: They are therefore also called bleaching varnishes below.