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State whether the following is true or false.
A carrier is an alternative to high temperature dyeing for polyester.

  • A.False
  • B.True only at large scales
  • C.False only at small scales
  • D.True

Answer: D

It swells the fibre so that dye can enter at the boil, which avoids the need for a pressure vessel. Its odour, cost and effluent load are why high temperature dyeing is now the norm. Carrier residues also affect the light fastness.

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