ISO 1833-11:2017 specifies a method, using sulfuric acid, to determine the mass percentage of cellulose fibres, after removal of non-fibrous matter, in textiles made of mixtures of
- natural and man-made cellulose fibres, such as cotton, flax, hemp, ramie, viscose, cupro, modal, lyocell
with
- polyester, polypropylene, elastomultiester, elastolefin and polypropylene/polyamide bicomponent.