Stiffling is done by putting a lot of cocoons in a steam oven for about :

Stiffling is done by putting a lot of cocoons in a steam oven for about :

  1. A

    15 to 20 min.

  2. B

    10 to 20 min.

  3. C

    10 to 15 min.

  4. D

    5 to 10 min.

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