Assertion: bleach | /r/HasProperty | removed
Facets:
value: from the tooth surface
type: LOCATION
value: from the hair
type: OTHER
value: between bleaching stages
type: TEMPORAL
Source sentences:
text: These materials must be removed between bleaching stages to avoid excessive use of bleaching chemicals since many of these smaller molecules are still susceptible to oxidation.
text: Since bleaching is the permanent removal of hair color, bleach can’t be removed from the hair 23.
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.