
Wool and cotton yarn is selected according to its fineness, length and its location on the sheep's body. The dust mixed with wool is then separated by a machine called a 'duster'. After the dust is removed, its natural and mixed filth is cleaned. A kind of heavy grease or wax remains in the natural filth, which is called yoke in English. Due to the yoke, the woollen fibre remains somewhat thicker and in good condition. Natural filth also consists of dried sweat, which flows out of the sheep's body, dries up and mixes with the wool. It is called Swint in English.