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Laboratory to bulk correlation matters because

  • A.bulk dyeing needs no recipe at all
  • B.a laboratory recipe may not reproduce in bulk
  • C.the laboratory uses quite different dyes
  • D.the customer sees only the laboratory sample

Answer: B

Correct answer: a laboratory recipe may not reproduce in bulk

The dyes are the same but the conditions are not: liquor ratio, temperature profile, mechanical action, water quality and substrate lot all differ between a laboratory dyepot and a production machine, and each shifts the exhaustion. A correlation factor is therefore established between the two and applied when the recipe is scaled, and it is checked continually because it drifts.

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