Impurities such as lubricants, dirt and other natural materials, water- soluble sizes, antistatic agents and fugitive tints used for yarn identification are removed in scouring.

• 润滑剂、尘土、其它自然物质、水溶性浆料、抗静电剂以及为了鉴别纱线而施加的浅色等杂质,均可通过煮练去除。