The raw material of silk yarn oil silk is silk waste, which has the characteristics of good breathability and strong drape of silk, with a soft and plump hand feel, and many fine cotton particles and fuzz on the surface. The formal writing of oil silk should be "chou silk", silk yarn, oil silk.

Silk floss or refined secondary cocoon silk floss is stretched and fluffed on a bamboo spinning frame, manually drawn into thread, or directly drawn into fine thread by an electric spinning machine, which is called "chou silk". This kind of chou silk, with only slight twisting, is very soft, and the cloth woven from it is called "chou fabric" or "raw chou".

What is oil silk

Oil silk is the waste material from the brocade-making process in silk spinning mills—waste brocade.

Oil silk is used in knitting socks. Socks made from oil silk not only have the moisture absorption properties of silk socks, with good comfort, a soft feel, and no foot odor, but also have the appearance effect of loop yarn socks, with particularly strong fuzz and a relatively coarse appearance, making them especially suitable for keeping warm and preventing frostbite in winter. Moreover, oil silk socks are low-priced and very popular among the working class. The surface of oil silk yarn retains more natural impurities, making it extremely rough in appearance and with poor strength. If such yarn is knitted on a sock machine without first undergoing the dyeing process, it often clogs and breaks, making continuous production impossible.