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The barium activity number is used to measure

  • A.the whiteness of the finished fabric
  • B.the residual size left on the fabric
  • C.the degree of mercerisation achieved
  • D.the caustic concentration in the liquor

Answer: C

It compares the barium hydroxide absorbed by the sample with that absorbed by an unmercerised control. A value around a hundred and fifteen or above indicates a well mercerised cotton. The test is a routine mill control.

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