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Slack mercerisation differs from the tensioned process in that it

  • A.uses a much weaker caustic solution than usual
  • B.is carried out at a high temperature only
  • C.produces no change at all in the fibre
  • D.lets the fabric shrink, giving bulk and stretch

Answer: D

The same swelling occurs but the fibre is allowed to contract, which gives a fuller handle and elastic recovery. It is used for stretch fabrics and towelling rather than for lustrous goods. The chemistry is identical in both cases.

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