Discussion
Desizing efficiency is commonly assessed by
Answer: C
Correct answer: the Tegewa violet scale with iodine
A drop of iodine solution is applied to the fabric and the colour compared against the Tegewa standard scale, which runs from 1 for heavily sized to 9 for fully desized. Iodine gives the familiar blue-violet with starch, so the intensity reports directly how much starch remains. Grade 7 or 8 is usually required before the fabric goes forward.
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