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See Chinese contents: FZ/T 01086-2020 FZ/T 01086-2020: Textiles - Test method for yarn hairness - Projection counting method
This document specifies the method for measuring the hairness of short fiber yarns using an optical projection hairness tester. This Standard applies to: a) Cotton yarn and cotton fiber yarn; b) Wool yarn and wool fiber yarn; c) Linen yarn; d) Silk spinning yarn; e) Medium to long fiber yarn; f) All types of blended yarns. This Standard does not apply to high elastic yarns, bulked yarns and fancy yarns.
