According to the American Society for Testing and Materials ASTM 123 yarns are defined as ‘generic term for a continuous strand of textile fibres, filaments or material in a from suitable for knitting, weaving or otherwise intertwining to form a textile fabric’.


Reference
- ASTM D 123
- Behery, H.M., Effect of yarn factors on fabric hand, in Effect of mechanical and physical properties on fabric hand, H.M. Behery, Editor 2005, Woodhead Publishing Limited and CRC Press: Cambridge.