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Transparent colourants differ from opaque ones in that transparent colourants

  • A.scatter the light strongly without absorbing any of it at all
  • B.cannot be mixed with one another in any proportion
  • C.are always applied in a much thicker layer
  • D.allow light to pass through and return from the substrate

Answer: D

The substrate contributes to the final appearance in a way it does not for opaque films. Glazing in painting exploits exactly this property. The substrate contributes to the final appearance. Glazing depends on exactly this behaviour.

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