Textiles - Quantitative chemical analysis - Part 18: Mixtures of silk with wool or other animal hair (method using sulfuric acid)

This document specifies a method, using sulfuric acid, to determine the mass percentage of silk, after removal of non-fibrous matter, in textiles made of mixtures of - silk with - wool or other animal hair.

Textiles — Analyse chimique quantitative — Partie 18: Mélanges de soie avec de la laine ou d'autres poils animaux (méthode à l'acide sulfurique)

Le présent document spécifie une méthode de détermination, à l'acide sulfurique, de la masse exprimée en pourcentage de soie, après élimination des matières non fibreuses, dans les textiles composés de mélanges de : — soie ; avec — laine ou autres poils animaux.

General Information

Status
Published
Publication Date
04-Oct-2020
Current Stage
9020 - International Standard under periodical review
Start Date
15-Oct-2025
Completion Date
15-Oct-2025
Ref Project

Relations

Overview

ISO 1833-18:2020 is an internationally recognized standard developed by the International Organization for Standardization (ISO) that details a quantitative chemical analysis method for textile fibers. Specifically, this standard provides a reliable procedure to determine the mass percentage of silk in textile mixtures containing silk combined with wool or other animal hairs. Using sulfuric acid as the key reagent, this third edition standardizes testing to ensure consistent, accurate identification of silk content after removing non-fibrous matter.

This methodology is crucial for quality control, regulatory compliance, and accurate labeling in the textile industry. By applying a chemical dissolution approach, manufacturers, laboratories, and quality assurance teams can precisely quantify silk proportions in mixed-fiber textiles.

Key Topics

  • Scope: Defines the scope focused on textiles made by mixing silk with wool or other animal hairs and specifies the use of sulfuric acid for analysis.
  • Principle: Silk fibers dissolve in 75% sulfuric acid; residues left after dissolution are weighed to calculate silk content by difference.
  • Reagents: Utilizes specific concentrations of sulfuric acid (75%) along with dilute sulfuric acid and ammonia solutions for processing and washing.
  • Apparatus: Requires glass-stoppered conical flasks and filtration equipment aligned with general ISO 1833 series apparatus.
  • Test Procedure: Involves treating a textile specimen with sulfuric acid, shaking and standing periods, filtration, washing with reagents, drying, and weighing residues.
  • Calculation: Results are calculated using established formulas consistent with ISO 1833-1 general principles, including correction factors.
  • Precision: The standard guarantees a confidence level of 95% with results accurate within ±1 percentage point on homogeneous textile mixtures.
  • Updates in 2020 Edition: Title change for clarity; refined scope specifying "wool or other animal hair" instead of generic “other protein fibers.”

Applications

ISO 1833-18:2020 serves a critical role across multiple sectors within textiles, including:

  • Textile Manufacturing: Ensures accurate measurement of silk content in blended fibers, facilitating product quality control and consistency.
  • Quality Assurance Laboratories: Enables routine laboratory testing for fiber composition verification in raw materials, intermediate fabrics, and finished products.
  • Regulatory Compliance: Supports adherence to textile labeling laws and standards by verifying fiber content according to international benchmarks.
  • Research and Development: Aids in material science studies concerning fiber blend behavior, textile durability, and performance characteristics by providing precise composition data.
  • Trade and Certification: Assists importers, exporters, and certification bodies in validating claims about silk proportions to maintain transparency and trust across supply chains.

Related Standards

  • ISO 1833-1: General principles of quantitative chemical analysis of textiles, providing the foundational procedures referenced by ISO 1833-18.
  • ISO 1833 Series: A comprehensive set of standards for quantitative analysis of various textile fiber mixtures.
  • ISO 1833-4: Specifies quantitative chemical analysis for mixtures of certain protein fibers using a hypochlorite method, complementary to the sulfuric acid approach.
  • ISO/IEC Directives: Guides the development and maintenance of ISO standards, ensuring procedural consistency and quality.
  • CEN/TC 248: European Committee for Standardization counterpart collaborating on textile standards development akin to ISO/TC 38.

Adhering to ISO 1833-18:2020 brings enhanced accuracy and international harmonization to the chemical analysis of silk-wool and silk-animal hair mixtures, supporting robust quality control and effective communication within the global textile industry. For comprehensive details, stakeholders should refer to the official publication from ISO and consult their national standards bodies.

Standard
ISO 1833-18:2020 - Textiles — Quantitative chemical analysis — Part 18: Mixtures of silk with wool or other animal hair (method using sulfuric acid) Released:10/5/2020
English language
3 pages
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Standard
ISO 1833-18:2020 - Textiles — Analyse chimique quantitative — Partie 18: Mélanges de soie avec de la laine ou d'autres poils animaux (méthode à l'acide sulfurique) Released:10/6/2020
French language
3 pages
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Standards Content (Sample)


INTERNATIONAL ISO
STANDARD 1833-18
Third edition
2020-10
Textiles — Quantitative chemical
analysis —
Part 18:
Mixtures of silk with wool or other
animal hair (method using sulfuric
acid)
Textiles — Analyse chimique quantitative —
Partie 18: Mélanges de soie avec de la laine ou d'autres poils animaux
(méthode à l'acide sulfurique)
Reference number
©
ISO 2020
© 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

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
7 Test procedure . 2
8 Calculation and expression of results . 2
9 Precision . 2
Bibliography . 3
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
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
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...


NORME ISO
INTERNATIONALE 1833-18
Troisième édition
2020-10
Textiles — Analyse chimique
quantitative —
Partie 18:
Mélanges de soie avec de la laine ou
d'autres poils animaux (méthode à
l'acide sulfurique)
Textiles — Quantitative chemical analysis —
Part 18: Mixtures of silk with wool or other animal hair (method
using sulfuric acid)
Numéro de référence
©
ISO 2020
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2020
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii © ISO 2020 – Tous droits réservés

Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Principe . 1
5 Réactifs . 1
6 Appareillage . 2
7 Mode opératoire d’essai. 2
8 Calcul et expression des résultats . 2
9 Fidélité . 2
Bibliographie . 3
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes
nationaux de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est
en général confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l’ISO participent également aux travaux.
L’ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents
critères d’approbation requis pour les différents types de documents ISO. Le présent document a été
rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir www
.iso .org/ directives).
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droits de propriété intellectuelle ou de droits analogues. L’ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
l’élaboration du document sont indiqués dans l’Introduction et/ou dans la liste des déclarations de
brevets reçues par l’ISO (voir www .iso .org/ brevets).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l’ISO liés à l’évaluation de la conformité, ou pour toute information au sujet de l’adhésion
de l’ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir le lien suivant : www .iso .org/ iso/ fr/ avant -propos.
Le présent document a été élaboré par le comité technique ISO
...

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Frequently Asked Questions

ISO 1833-18:2020 is a standard published by the International Organization for Standardization (ISO). Its full title is "Textiles - Quantitative chemical analysis - Part 18: Mixtures of silk with wool or other animal hair (method using sulfuric acid)". This standard covers: This document specifies a method, using sulfuric acid, to determine the mass percentage of silk, after removal of non-fibrous matter, in textiles made of mixtures of - silk with - wool or other animal hair.

This document specifies a method, using sulfuric acid, to determine the mass percentage of silk, after removal of non-fibrous matter, in textiles made of mixtures of - silk with - wool or other animal hair.

ISO 1833-18:2020 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.

ISO 1833-18:2020 has the following relationships with other standards: It is inter standard links to ISO 1833-18:2019. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

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