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A metameric match is one where two samples

  • A.match under every illuminant used
  • B.use the same dyes in the same proportions
  • C.have identical reflectance curves
  • D.match under one illuminant only

Answer: D

It arises when the two are made with different dyes whose reflectance curves cross rather than coincide. Matching curve for curve is the only way to avoid it and is not always possible. Different dyes with crossing curves are the cause.

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