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Alkalinity of process water matters because it

  • A.is precisely the same thing as hardness
  • B.affects only the boiler feed water
  • C.consumes acid and shifts the dyebath pH
  • D.causes scale in the same way as hardness

Answer: C

A dyebath set at a particular pH will drift if the water carries substantial bicarbonate, and the buffer demand changes from batch to batch. It is measured separately from hardness for that reason. Buffering the bath is the usual remedy.

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