How do silkworms spit out flat silk

Flat silk can be directly processed into calligraphy and painting silk paper, silk stickers, silk quilts and a variety of handicrafts, which can get a better price than ordinary silk products. So how to make the silkworm spit flat silk? the way is not to give cocoon harness in the process of silkworm rearing, but to put the silkworm on the plane and naturally spit out the flat silk; then after degumming.

Here are some points that should be paid attention to to let silkworm spit flat silk:

Preparation of plane objects: each box of silkworms should prepare 35-40 square meters of Reed curtains, bamboo curtains and other plane objects before they are ripe. And the production of calligraphy and painting paper, requires a smooth surface, can be spread out on the plane with plastic sheeting, and then determine the size according to the use. General production of silk cotton, with a width of 1 meter and a length of 2 meters is appropriate.

The age of silkworms should be consistent: if the age of silkworms is inconsistent, silking will end differently, affecting the rate of silk production. The way to make silkworms mature and consistent is to add molting hormone after 5% ripening, which can promote mature consistency and increase the amount of flat silk. Before spinning, let the cooked silkworms drain some of the silkworm droppings, and then catch them on the plane.

The density of silkworms should be suitable: 500 silkworms per square meter in spring and about 700 in summer and autumn.

The light should be dark and uniform: the light is dim and uniform, which can make the silkworms distribute and spin evenly on the plane. The appropriate temperature is 25 ℃, too high will affect the spinning amount, and too low will prolong the spinning time. The humidity should be on the high side.

Strengthen the management of the silking process: before spinning, some of the mature silkworms put on the plane will crawl for the cocoon camp, so it is necessary to regularly take the wandering silkworm and put it back on the plane. After about a day and night, spit into a yellow loose flat screen, at this time the silkworm feces and urine finished, the whole body transparent. Silk spinning should be checked regularly, dig out "buried" silkworms (sick and weak silkworms are entangled in flat floating silk) and properly evenly seated, which usually takes 1-2 days. In the early stage at the end of silking, the focus of management is to dig out "buried" silkworms and fall silkworms. When the silkworm spinning is finished, put away the hairy silkworms and become flat silk.