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Metamerism is most likely to be a problem when the standard and the batch

  • A.were produced using different colourants or substrates
  • B.were produced using identical colourants and substrates
  • C.reflect identically at every wavelength
  • D.were measured on the same instrument

Answer: A

Correct answer: were produced using different colourants or substrates

Metamerism requires a spectral difference, and a spectral difference arises when the materials differ. Identical colourants on identical substrates give identical curves and cannot be metameric, however they are measured. Measuring on the same instrument affects the measurement, not the samples.

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