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The CMC ratio most commonly used for acceptability judgements in textiles is

  • A.5 to 1
  • B.1 to 2
  • C.2 to 1
  • D.1 to 1

Answer: C

It reflects the observation that lightness differences are better tolerated commercially. The one to one ratio is used where the question is whether a difference is visible at all. Two to one suits commercial acceptability instead.

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