scope:

This part of ISO 1833 specifies a method, using dimethylformamide, to determine the mass percentage of acrylic, modacrylic, chlorofibre or elastane, after removal of non-fibrous matter, in textiles made of mixtures of - acrylic, certain modacrylics, certain chlorofibres, certain elastane fibres and - wool, animal hair,silk, cotton, viscose, cupro, modal,lyocell, polyamide, polyester, elastomultiester, elastolefine, melamine or glass fibres. It is not applicable to animal hair, wool and silk dyed with chromium based mordant dyes. NOTE - Dyestuff identification is described in ISO 16373-1 (see Bibliography). Where certain modacrylic fibres, certain chlorofibres or certain elastane fibres are present, a preliminary test shall be carried out to determine whether the fibre is completely soluble in the reagent. It is also possible to analyse mixtures containing elastane fibres by using the test methods described in ISO 1833-20 or ISO 1833-21