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Discussion

The laboratory to bulk relationship in dyeing means that

  • A.the software predicts bulk results with no calibration at all
  • B.a recipe matched in the laboratory may need adjustment in bulk
  • C.laboratory and bulk dyeings are always identical
  • D.bulk dyeings need no measurement whatever

Answer: B

Correct answer: a recipe matched in the laboratory may need adjustment in bulk

Liquor ratio, agitation, heating rate and machine type all differ between a laboratory dyeing and a production batch, and dyes exhaust differently under those conditions. A correction factor between laboratory and bulk is established empirically for each machine and process, and it must be maintained just as the database is.

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