Discussion
Consider the following statements about caustic concentration in mercerising.
1. Too weak a liquor swells the fibre without developing full lustre.
2. The working range is roughly 24 to 30 degrees Baume.
3. Stronger caustic always gives a better result.
Answer: B
The first two are correct. The third is wrong, since above the working range the extra caustic adds cost and effluent without further benefit and can make the fabric harsh to handle. Baume is the traditional mill unit for the liquor.
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