1 SCOPE AND FIEL0 OF APPLICATION 1.1 This International Standard specifies a method of test for the determination of the breaking tenacity of cotton fibres arranged in a parallel manner in a flat bundle. The method applies to fibres from raw cotton, or to fibres from various stages in the manufacturing process, or to fibres separated or extracted from manufactured cotton products. The method is applicable to fibres being tested either at a nominal gauge length of Zero, or at a finite gauge length. 1.2 The method is especially intended to be used with tensile strength test instruments which have been designed for specific use on flat bundles of cotton fibres (see the annexes). lt may be used with other tensile strength test instruments if equipped to accommodate the fibre clamps