Discussion
Consider the following statements about applying a brightener by the pad route.
1. The fabric is padded with the solution and then dried or cured.
2. Uniform pick-up across the width is essential for an even result.
3. The pad route guarantees better levelness than exhaust application.
Answer: A
Correct answer: 1 and 2 only
Statements 1 and 2 are correct: the pad route applies the solution by nip and then dries or cures, and the add-on is the product of the pick-up and the concentration, so an uneven pick-up across the width gives an uneven white. Statement 3 claims too much - padding is faster and suits continuous ranges, but exhaust application relies on the brightener’s own affinity and can give better levelness on goods that are difficult to pad evenly.
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