Testing and evaluation of a wide range of fibre properties are essential for research and quality control purposes in fibre production and for assessing the processability of fibres in carding and spinning. For man-made fibres and in some cases even for natural fibres these tests are carried out on single fibres. Here, typical testing methods are the static tensile test, linear-density (fineness) measurement, and measurement of crimp extension, crimp stability as well as number of crimps.