This European Standard specifies requirements for industrial sewing threads made wholly or partly from synthetic fibres. It specifies requirements for industrial sewing threads based on breaking force in relation to the thread size. For threads which are for use in the garment trade it also specifies colour fastness and boiling water shrinkage requirements. It deals with industrial sewing threads made from the following substrates and combinations of substrates: a) Continuous filament polyester; b) Staple fibre polyester; c) Air-Jet textured polyester (see 3.3); d) False twist textured polyester (see 3.4);...