Why do silkworms spit out colorful silk?
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The famous "Silk Road" refers to this western-west traffic road between China and Central Asia, China and India, which is based on silk trade, from 114 BC to 127 AD. The "Silk Road" connects the trade path between China and the outside world and is a symbol of the Chinese nation going to the world.
Don't look at the silkworm baby so weak, but it uses the silk spit from life to become silky and beautiful silk after a series of processes such as silk reeling and weaving. It is because of its uniqueness and beauty that it has been loved by foreigners. Later "Silk Road." The Silk Road connects China's trade with the outside world and is a symbol of the Chinese nation's move to the world.
Silkworm is a "complete metamorphosis insect", a strange name, what is called "complete metamorphosis insect", that is to say, it will completely change its developmental stages in the four forms and physiological functions of eggs, larvae, pupa and adults. Interesting.
Mulberry leaves are the favorite food for silkworms. After eating mulberry leaves, the body slowly turns white. After a while, it begins to peel off. About one day when peeling, such as sleep, do not eat or move, this is called "sleeping." After a peeling, it is the second instar larvae. It takes one year to take off the skin, and it has to peel six times. The second, third and fourth instar silkworms once become a cockroach once, becoming a silkworm moth once), becoming a fifth instar larvae about 6-8 days before they begin to spit silk.
The silkworm baby of the fifth instar larvae needs two days and two nights to form a skeleton, and a silky silk is as long as 1.5 kilometers! And in the sputum, the last peeling, became 蛹. About ten days later, the feather became a silk moth and broke out. After the cockroach, the tail of the female moth emits a scent to lure the male to the tail. After the mating, the female moth can produce about 500 eggs in about 4-5 hours, and then slowly die.
Everyone knows that the silkworm baby eats the green mulberry leaves, and the chlorophyll in the mulberry leaves is digested and decomposed by the digestive juice of the silkworm baby, and the white silk is spit out. But this time I saw a very novel thing in the museum, except for the white silkworm cocoons, as well as silkworm cocoons of pink, yellow and blue.
Nowadays, in addition to making all kinds of exquisite, delicate and elegant silk, the most used in life should be silk quilt. The silk is affected by more and more people because of its warmth, fluffy and soft, breathable health care. I love it, so there are also a variety of "silk quilts" on the market, which makes consumers stupid and unclear.
Nowadays, most fake silk quilts are made of chemical fiber or silk fiber mixed with chemical fiber to refill it. Now I am here to teach you a few tricks to identify true and false silk quilts.
1: Pull. It is not easy to break the silk gently, but the fake or chemical fiber pull is easy to break.
2: Burning. Nowadays, the more common identification method is to use a lighter to burn. After burning, ask about the taste. Silk is animal protein. After burning, the taste is like the smell of burning hair, and the addition of chemical fiber has the smell of burning plastic. After burning, you can use your finger to gently rub it. The silk is really gray, and the fake is sticky.
3: Dissolve with 84 disinfectant. This method is super easy to use, put the silk into the 84 disinfectant, the real silk can be completely dissolved.
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