How is the "natural fiber" silk drawn from the cocoon? How many kinds do you have? How much is the price per jin? How to tell the true from the false?

Silk is a continuous long fiber, also known as natural silk, which is solidified by the silk liquid secreted by mature silkworm cocooning. It is a kind of natural fiber. How did the silk get out of the cocoon? How many kinds do you have? How much is the price per jin? How to tell the true from the false? It is learned from Changsha Gaoqiao Wholesale Market that only six jin of raw cocoon can pull out one jin of silk, and the price of silk is 180-220 yuan, so the formula for calculating the price of dried cocoon is the price of dried cocoon silk * weight plus cost.

How is the silk drawn from the cocoon?

1. The live silkworm pupae and parasitic fly eggs in the fresh cocoon cavity will turn out of maggots and drill out of the cocoon shell after a certain period of time, so that the cocoon layer can not be reeled, so that the pupa and maggots must be killed by hot air or electromagnetic waves in time, and an appropriate amount of moisture must be removed to dry the cocoon so that it will not mildew and deteriorate and is convenient for storage.

2. The drying process of cocoon is also called cocoon drying. Dry cocoons are called dried cocoons. In order to prevent mildew and deterioration of dried cocoons, it is necessary to strengthen the control of temperature and humidity and take measures to prevent insects and rats during cocoon storage. Mulberry cocoons are generally reeled with dry cocoons.

3. The dissociation of fresh tussah cocoons is better than that of semi-dried cocoons and dried cocoons, so fresh cocoons are reeled in winter and spring in northern China. After April, before pupae change into moths, dried cocoons are put into open-air storage in cocoon cages or stored in storage after drying. Due to the high temperature in southern China, fresh cocoons are not suitable for silk reeling, just like silkworm cocoons, which are dried and stored.

How many kinds of silk do you have?

1. Silk is a continuous long fiber, also known as "natural silk", which secretes silk liquid and solidifies when mature silkworm cocoons. Like wool, it is one of the earliest animal fibers used by human beings.

2. According to the difference of food, it can be divided into mulberry silkworm, tussah silkworm, cassava silkworm, camphor silkworm, willow silkworm and Bombyx mori. The filament drawn from a single cocoon is called cocoon silk, which is made up of two single fibers covered by sericin.

3. The silk strips from several cocoons are extracted and wrapped with sericin, which can be divided into mulberry silk (also known as raw silk) and tussah silk, collectively referred to as silk. Silk without sericin is called refined silk.

How can silk tell the true from the false?

1, pull the silk, the silk is relatively small and uniform, and very capricious, not easy to break. There is a certain adhesion between silk.

2. Silk is a natural fiber. When poured with fire, once the fire source leaves, it will be extinguished, and there will be no open fire.

3. When silk is burning, it will not produce open fire, and the smoke produced is white. When silk burns, it becomes charcoal and feels like powder.

4. After the silkworm becomes a cocoon, it will have a faint fragrance when it is put into its nose, but it will not have any smell after it is finished. But you can still tell whether the silk is real or not by smelling it. When silk is burned, it will give off a smell similar to hair burning, because the main component of silk is protein.

The price of silk is very high. At present, the purchase price of cocoons is 40 to 50 kilograms, and the finished silk is more than 150 yuan. Plus processing fees and taxes and so on. It is impossible for low-priced products to say that they are pure silk.