This method determines the breaking strength of skeins of yarn.

The method is primarily for quality control and acceptance testing of spun yarns. A skein provides a large enough specimen to average out some of the variation inherent in spun yarns, thus providing a useful index that combines the effects of uneveness and single-strand strength.

This method is frequently combined with the determination of yarn linear density, thus making use of the same skeins of yarn for both tests.

This method may require the use materials and/or equipment that could be hazardous. This document does not purport to address all the safety aspects associated with its use. Anyone using this method has the responsibility to consult the appropriate authorities and to establish appropriate health and safety practices in conjunction with any existing applicable regulatory requirements prior to its use.