Discussion
Match each size with the desizing route usually chosen for it.
List I
A. Starch
B. Polyvinyl alcohol
C. Carboxymethyl cellulose
D. Acrylic size
List II
1. hot alkaline wash
2. enzymatic hydrolysis with amylase
3. hot water or dilute alkali
4. hot water washing, since it is soluble
Answer: D
Starch is the one that needs a chemical or enzymatic attack, because it is insoluble and must be broken down before it will wash out. The synthetic sizes were developed partly to make removal easier. Solubility is what decides the route.
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