Yarn Preparation

Yarn is made from fibers. Primitive people discovered that a succession of short fibers could be twisted into a continuous yarn. The direction of the twist may be observed by holding the yarn in a vertical position.

  

If the spirals conform to the direction of the slope of the central part of the letter 'S' the yarn has an S twist.

If the spirals conform to the direction of the slope of the central part of the letter 'Z' the yarn has Z twist.