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The standard against which a batch is compared should be

  • A.the shade card issued by the colourant supplier
  • B.a physical sample or a set of agreed numerical values
  • C.the memory of the colourist making the judgement
  • D.any convenient sample from a previous production run

Answer: B

Correct answer: a physical sample or a set of agreed numerical values

The standard must be something both parties can refer to and neither can dispute, so it is either a physical sample held by both or an agreed set of values with the measurement conditions stated. A supplier’s shade card, a previous batch or a colourist’s recollection are none of them a defined reference.

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