Raw silk is the product obtained after reeling mulberry cocoons. Mulberry cocoon is the cocoon layer of Bombyx mori, an insect of Bombycidae. Mulberry silk is the product of reeling cocoon. Mulberry and sericulture are planted in most parts of China, especially in Jiangsu, Zhejiang, Jiangsu and Anhui, so the silk produced in these places is also the most famous.
Silk reeling is a major process in the silk-making process, and the production experience created and accumulated by working people in past dynasties is valuable scientific knowledge, which is still of great significance to today's production. Since the Southern Dynasties, the quantifier of silk has also begun to use "billion" (homonym with "billion"), which has been used ever since. In addition, before the middle Tang Dynasty, there was the quantifier "He".
So how much raw silk can be reeled per ton of cocoon is not a fixed value, it depends on many factors, including cocoon quality, reeling technology and equipment, operator skills and so on.