This Pakistan Standard provides the requirements
for the determination of twist (expressed as turns per unit len gth) of spun and continuous filament single yarns from a sam ple of plied or cabled yarn, whether plain or fancy. It does not cover the yarns removed from fabrics.
The designation of direction of twist in single, plied and cabled yarns is given in PS: 120-1960, "Designation of the structure of single, plied and cabled yarns".