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A colour difference formula fitted to visual data will perform best

  • A.on the kind of samples and conditions used in the fitting
  • B.equally well on every kind of sample and every condition
  • C.only on samples measured by the same instrument
  • D.only for observers who took part in the experiment

Answer: A

CMC was fitted largely on textile data and performs well on textiles. Extrapolating a formula far beyond its fitting conditions is always a risk. CMC performs best on textile samples. Fitting conditions bound the reliable range.

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