Products from silkworm cocoon reeling Raw silk is the product of silkworm cocoon reeling. It is commonly known as real silk. Machine reeled silk is also called factory silk, and hand reeled silk is called native silk. Raw silk is called cooked silk after degumming. China has a long history of raw silk, and its modern output ranks first in the world. The product obtained from silkworm cocoon reeling. Put the fine cocoons into a cocoon cooker with 80 â?? hot water to soften and puff them, and then pull out several cocoon filaments with a thread scanner to continuously wind them on the reeling frame, which is called "reeling"; At this time, the cocoon silk still contains about 20% sericin, and the shiny silk is covered by sericin, so the texture is slightly hard and translucent, which is called "raw silk". Since the average length of silk that can be reeled from a single cocoon is 600-800 meters, the raw silk is a continuous fiber, which is very suitable for weaving; After degumming and degumming, raw silk is soft and glossy, which is called "cooked silk"; There are three, five and seven refining methods for raw silk according to the product use.