Silkworm

Silkworm or silk moth is the producer of silk. They have a high value in economic class. The silkworm is came from China. They have produce silkworm since 5000 years ago. Silkworm egg need about ten days to hatch, and then worm will change to be unfinished silk Cocoon that can produce about 300 until 900 meters silk yarn/cocoon, and diameter of fiber is about 10 micrometer.

The silkworm’s food is mulberry leaves. As usual, silkworm eat continuously in a long day, so they grow fastly . If the color of their head was more dark , silkworm will change their skin and they have four fase . In the last fase , the color of silkworm is yellowish, and that is a sign silkworm will be wrap up from cocoon. Before silkworm come out from cocoon, cocoon must be stewed for kill silkworm and so that fiber will be easy to analyze. Adult butterfly that take care in the field is can’t be fly.

People can make medicines from dry silkworm larva for cure cough a cold, melting down phlegm and demulcent twice. Price of one kilogram silk is about Rp 25.000 until Rp 30.000. And the price of silk yarn import is about Rp 310.000 per kilograms. Every years, this world is produce about 70 million pound silk raw and we need about 10 billions pound mulberry leaves for silkworm’s food.
People can also make medical industry from dry silkworm larva for cure cough a cold, melting down phlegm and demulcent. Cosmetic industry is also make a fiber’s silk useful because of the fiber’s silk is hygroscopic, hamper UV ray, and can keep elasticity of our skin.