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ISO 1833-22:2020

Textiles — Quantitative chemical analysis — Part 22: Mixtures of viscose or certain types of cupro or modal or lyocell with flax fibres (method using formic acid and zinc chloride)

General information
Valid from 11.12.2020
Directives or regulations
None
Standard history
Status
Date
Type
Name
11.12.2020
Main
19.02.2013
Main
This document specifies a method, using formic acid and zinc chloride, to determine the mass percentage of viscose or certain types of cupro or modal or lyocell, after removal of non-fibrous matter, in textiles made of mixtures of - viscose or certain types of the cupro or modal or lyocell fibres with - flax fibres. This document is not applicable to mixtures in which the flax fibre has suffered extensive chemical degradation, nor when the viscose, cupro, modal or lyocell fibre is rendered incompletely soluble by the presence of certain permanent finishes or reactive dyes that cannot be removed completely.
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