ISO 3343:1984

Textile glass — Yarns — Determination of twist balance index

Specification of a method for determining the twist balance index of folded and cabled textile glass yarns. Test specimen is 1 m of tangentially from a package unwound yarn. If the specimen hangs down to form an open loop, with the two ends 100 mm apart, the number of turns shall be counted, which the yarn makes on itself. The determination shall be repeated five times.