My silkworm cocoon, is yellow, good, how to take the cocoon?

1. Each silkworm cocoon are some slight differences, the top cocoon is pure white, cocoon type and cocoon thicker; medium cocoon with yellowish spots, cocoon type is not correct and slightly donor injury; inferior cocoon color yellow color is not correct, there are donor injuries, and cocoon quality is thinner.

2. Find a complete cocoon, shake, if there is a sound inside, basically can be concluded that the silkworm has been transformed into a pupa, otherwise it may still be silkworm. Find one that has a ringing sound.

Peel off the messy silk on the outside.

. Soak the cocoons in boiling water for about half an hour. It's best to keep one in each cup.

Get a small wooden stick, the less smooth the better, and stir it around the cocoon in the cup. Stir it for a while, and look carefully at the stick to see if one or more of the silks are tangled up.

If not, continue to stir until there is until. If there is a root that is, pull out the line, usually can not be broken, broken, or in accordance with the 4-5 steps of the method to continue. If there are several roots, that is to draw each one, some of them will not be able to do so, the remaining one will be the longest, it is best to do a simple gadgets to shake, otherwise it will be exhausting, usually about three hours to finish winding.