Discussion
The traditional crease resist resins released
Answer: A
Correct answer: formaldehyde, now tightly restricted
The classic durable press resins are N-methylol compounds, which release free formaldehyde during curing and slowly afterwards in storage and wear. Formaldehyde is an irritant and a recognised carcinogen, so release limits are set by legislation and by retailer specifications, and the industry has moved to low-release and free formaldehyde chemistries.
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