Tag Archives: silkworm

Goddes of Silk: blhsilingsu

Origin of Silk
“Chinese legend gives the title Goddess of Silk to Lady Hsi-Ling-Shih, wife of the mythical Yellow Emperor, who was said to have ruled China in about 3000 BC. She is credited with the introduction of silkworm rearing and the invention of the loom”

The emperor Huang-Ti ordered his wife Hsi-Ling-Shi to investigate what was eating the leaves on his mulberry trees. She found white worms that spin shiny cocoons. According to the story, she accidentally dropped one of these cocoons into her hot tea and a delicate filament separated itself. She drew it out, unwinding a long single strand. Hsi-Ling-Shi had discovered silk.

hsi-lingsu
Hsi-Ling-Su

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Silkworms: aa062797

Silk has always had a romantic appeal. Silk production was a closely guarded secret, developed by the Chinese about 4000 years ago. The silk fiber is triangular, giving it unique light reflecting properties. Silk fiber is stronger than steel, yet can be spun and woven into the most delicate of fabrics.

The silkworm starts its life as a pin-head sized egg. Eggs are place on a fine mesh tray, covered with choppedy mulberry leaves The grubs emerge in about two weeks and then feed voraciously. They shed their skins as they grow.

Each shedding is called an instar.
Life of the Bombyx shows images of the growth of the silk worm.

When the larvae is about 4 inches in length, it stops feeding and is ready to pupate and to spin its cocoon. A silk worm can spin a thread more than two miles long.

After the cocoon is complete and the pupa is removed, the fibers are slowly opened. The long filaments are drawn out from the edge into a roving that can be spun. Silk is processed in reeling and twisting factories.

Raising Silk Worms
How to raise silk worms in the classroom

Macclesfield Museums
Visit the virtual silk museums – from egg to cocoon.

Genetically Engineerind Spider Silk
Mutant silk worms are being raised to produce silk stronger than steel.

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