EN ISO 1833-22:2021
(Main)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) (ISO 1833 22:2020)
General Information
- Abstract
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.
- Status
- Published
- Publication Date
- 03-Aug-2021
- Withdrawal Date
- 27-Feb-2022
- Technical Committee
- CEN/TC 248 - Textiles and textile products
- Drafting Committee
- CEN/TC 248/WG 30 - Quantitative analysis of fibre mixtures
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 04-Aug-2021
- Completion Date
- 04-Aug-2021
Overview
EN ISO 1833-22:2021 (ISO 1833-22:2020) specifies a quantitative chemical test method for determining the mass percentage of viscose or certain types of cupro, modal or lyocell in textiles that are blended with flax fibres. The method uses a formic acid / zinc chloride reagent to dissolve the viscose-type components after pre‑treatment to remove non-fibrous matter. It is adopted by CEN and supersedes EN ISO 1833-22:2013.
Key topics and technical requirements
- Scope & exclusions
- Applicable to mixtures of viscose (and some cupro, modal or lyocell) with flax.
- Not applicable if flax has undergone extensive chemical degradation or if viscose/cupro/modal/lyocell is rendered incompletely soluble by permanent finishes or reactive dyes.
- Principle
- Remove non-cellulosic components from flax (pre-treatment with sodium hydroxide per ISO 1833-1).
- Dissolve viscose/cupro/modal/lyocell using a formic acid/zinc chloride reagent.
- Collect, wash, dry and weigh the residue; determine fibre percentages by mass difference and corrected dry mass.
- Reagents & apparatus
- Formic acid/zinc chloride reagent: prepared with 20 g anhydrous ZnCl2 and 68 g anhydrous formic acid made up to 100 g with water.
- Supporting reagents: 0.1 mol/L acetic acid solution and dilute ammonia (for neutralization).
- Equipment: conical flask (≥200 ml), heating apparatus capable of (70 ± 2) °C, weighed filter crucible.
- Procedure parameters
- Dissolution performed at 70 °C for 20 minutes with intermittent shaking; filter, wash, dry and weigh residue.
- Calculations include corrections for pre-treatment mass loss and application of d-factors (updated in this edition).
- Documentation
- Clause references and precision information are included; users must follow ISO 1833-1 general principles for test organisation.
Applications and users
- Who uses it
- Textile testing laboratories, quality assurance teams, fibre suppliers, manufacturers of blended fabrics, certification and compliance bodies, research institutions.
- Practical uses
- Verifying declared fibre composition for labelling and regulatory compliance.
- Quality control of viscose–flax, modal–flax or lyocell–flax blends.
- Supplier acceptance testing and raw material inspection.
- Research into fibre blends, biodegradability and performance of cellulose-based composites.
Related standards
- ISO 1833-1:2020 - General principles of quantitative chemical analysis for textiles (normative reference).
- EN ISO 1833 series - other parts cover different fiber combinations and test methods.
Keywords: EN ISO 1833-22:2021, textile quantitative chemical analysis, viscose flax mixtures, formic acid zinc chloride method, cupro modal lyocell, fibre composition testing.
Relations
- Effective Date
- 08-Jun-2022
- Refers
ISO 1833-1:2020 - Textiles — Quantitative chemical analysis — Part 1: General principles of testing - Effective Date
- 09-Feb-2026
- Effective Date
- 12-Feb-2026
Get Certified
Connect with accredited certification bodies for this standard
Control Union Certifications
Global certification for agriculture and sustainability.
Hohenstein Institut
Textile testing and certification.
Bureau Veritas Bangladesh
Bureau Veritas certification services in Bangladesh.
Sponsored listings
Frequently Asked Questions
EN ISO 1833-22:2021 is a standard published by the European Committee for Standardization (CEN). Its full title is "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) (ISO 1833 22:2020)". This standard covers: 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.
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.
EN ISO 1833-22:2021 is classified under the following ICS (International Classification for Standards) categories: 59.060.01 - Textile fibres in general. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 1833-22:2021 has the following relationships with other standards: It is inter standard links to EN ISO 1833-22:2013, ISO 1833-1:2020, ISO 1833-22:2020. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN ISO 1833-22:2021 is associated with the following European legislation: EU Directives/Regulations: 1007/2011; Standardization Mandates: M/532. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN ISO 1833-22:2021 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2021
Nadomešča:
SIST EN ISO 1833-22:2013
Tekstilije - Kvantitativna kemična analiza - 22. del: Mešanice viskoznih ali
določenih vrst bakrenih ali modalnih ali liocelnih in ploščatih vlaken (metoda z
uporabo mravljične kisline in cinkovega klorida) (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)
(ISO 1833 22:2020)
Textilien - Quantitative chemische Analysen - Teil 22: Mischungen aus Viskose oder
bestimmten Arten von Cupro-, Modal- oder Lyocellfasern mit Flachsfasern
(Ameisensäure-/Zinkchlorid-Verfahren) (ISO 1833-22:2020)
Textiles - Analyse chimique quantitative - Partie 22: Mélanges de viscose ou de certains
types de cupro, modal ou lyocell avec des fibres de lin (méthode à l’acide formique et au
chlorure de zinc) (ISO 1833-22:2020)
Ta slovenski standard je istoveten z: EN ISO 1833-22:2021
ICS:
59.060.01 Tekstilna vlakna na splošno Textile fibres in general
71.040.40 Kemijska analiza Chemical analysis
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 1833-22
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2021
EUROPÄISCHE NORM
ICS 59.060.01 Supersedes EN ISO 1833-22:2013
English Version
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) (ISO 1833 22:2020)
Textiles - Analyse chimique quantitative - Partie 22: Textilien - Quantitative chemische Analysen - Teil 22:
Mélanges de viscose ou de certains types de cupro, Mischungen aus Viskose oder bestimmten Arten von
modal ou lyocell avec des fibres de lin (méthode à Cupro-, Modal- oder Lyocellfasern mit Flachsfasern
l'acide formique et au chlorure de zinc) (ISO 1833- (Ameisensäure-/Zinkchlorid-Verfahren) (ISO 1833-
22:2020) 22:2020)
This European Standard was approved by CEN on 14 December 2020.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1833-22:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 1833-22:2021) has been prepared by Technical Committee ISO/TC 38
"Textiles" in collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the
secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by February 2022, and conflicting national standards
shall be withdrawn at the latest by February 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 1833-22:2013.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN websites.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 1833-22:2020 has been approved by CEN as EN ISO 1833-22:2021 without any
modification.
INTERNATIONAL ISO
STANDARD 1833-22
Second edition
2020-12
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)
Textiles — Analyse chimique quantitative —
Partie 22: Mélanges de viscose ou de certains types de cupro, modal
ou lyocell avec des fibres de lin (méthode à l’acide formique et au
chlorure de zinc)
Reference number
ISO 1833-22:2020(E)
©
ISO 2020
ISO 1833-22:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
ISO 1833-22:2020(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents and apparatus . 2
5.1 General . 2
5.2 Reagent . 2
5.3 Apparatus . 2
6 Test procedure . 2
6.1 General . 2
6.2 Removal of the non-cellulosic components of the flax fibres . 2
6.3 Dissolution of viscose, cupro, modal or lyocell fibre . 2
7 Calculation and expression of results . 3
7.1 Calculation of loss in mass during pre-treatment . 3
7.2 Calculation of dry mass of after-transfer mixture corrected to its initial dry mass
before pre-treatment . 3
7.3 Calculation of dry masses of viscose or cupro or modal or lyocell and pretreated
flax fibres . 3
7.4 Calculation of the percentages of each component with agreed percentage
additions for moisture . 4
8 Precision . 4
ISO 1833-22:2020(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical stand
...