Four methods using constant rate of specimen extension tensile testers are specified: A: manual, specimens are taken directly from conditioned packages; B: automatic, specimens are taken directly from conditioned packages; C: manual, relaxed test skeins are used after conditioning; D: manual, specimens are used after wetting. Applies to all types of yarn except glass yarns, elastomeric yarns, aramid yarns, ceramic yarns, carbon yarns and polyolefin tape yarns.