Probably the most common method is to convert fibers into yarns, which are then constructed into fabrics. Yarns are essential for knitted, woven or knotted structures and for many braided ones. Yarn is defined by the American Society for Testing and Materials (ASTM) as A generic term for a continuous strand of textile fiber, filament, or material suitable for knitting, weaving to form a textile fabric. Yarn occurs in the following forms.

1. Preparing a viscous solution or syrup dope. 2. Extruding this solution through spinneret to form a fiber. 3. Solidifying the fiber by coagulation, evaporation or cooling. Manufacturing process of rayon The raw material can be made by mixing or dissolving natural fibers with some chemicals where they are called regenerated fibers or just with the mixing of the chemicals.