Question

the cocoons are kept in boiling water to obtain silk threads ​

Answer 1

Cocoons are collected and kept under the sun, or boiled, or exposed to steam. This helps in separating out the silk fibers. The process by which silk thread is separated from the cocoon is called reeling the silk. Then, the spinning of silk fibers into threads is done.

The silk threads obtained are woven into the desired clothes.

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Answer 2

Cocoons are Placed in boiling water to get smooth & continious thread from it. ... The cocoons are put on steam (Hot boiling water Vapours) to soften the Cocoons Upper Layers and Kill the larvae (Silk Worm) & can be stored as is for more than 10 days. Now the Cocoon is ready to manufacture Raw Silk.