SIST EN ISO 1833-18:2020

Textiles - Quantitative chemical analysis - Part 18: Mixtures of silk with wool or other animal hair (method using sulfuric acid) (ISO 1833-18:2020)

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.

Textilien - Quantitative chemische Analysen - Teil 18: Mischungen aus Seide mit Wolle oder anderen Tierhaaren (Verfahren mit Schwefelsäure) (ISO 1833 18:2020)

Dieses Dokument legt ein Schwefelsäure Verfahren fest zur Bestimmung des prozentualen Massenanteils an Seide, nach dem Abtrennen der nichtfaserigen Begleitstoffe, in Textilien aus Mischungen aus
- Seide
mit
- Wolle oder anderen Tierhaaren.

Textiles - Analyse chimique quantitative - Partie 18: Mélanges de soie avec de la laine ou d'autres poils animaux (méthode à l'acide sulfurique) (ISO 1833-18:2020)

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.

Tekstilije - Kvantitativna kemična analiza - 18. del: Mešanica svile z volno ali drugimi živalskimi vlakni (metoda z uporabo žveplene kisline) (ISO 1833-18:2020)

General Information

• Status: Published
• Public Enquiry End Date: 01-Jul-2020
• Publication Date: 08-Nov-2020
• ICS: 59.060.10 - Natural fibres
• ICS: 71.040.40 - Chemical analysis
• Technical Committee: ITEK - Textile and textile products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 29-Oct-2020
• Due Date: 03-Jan-2021
• Completion Date: 09-Nov-2020
• Mandate: M/532 - [C(2015)1385] Standardisation request to the European Committee for Standardisation as regards methods for quantitative analysis of textile products composed of certain binary and ternary textile fibre mixtures
• Ref Project: EN ISO 1833-18:2020 - Textiles - Quantitative chemical analysis - Part 18: Mixtures of silk with wool or other animal hair (method using sulfuric acid) (ISO 1833-18:2020)

Relations

• Replaces: SIST EN ISO 1833-18:2019 - Textiles - Quantitative chemical analysis - Part 18: Mixtures of silk with other protein fibres (method using sulfuric acid) (ISO 1833-18:2019)
• Effective Date: 01-Dec-2020

Overview

SIST EN ISO 1833-18:2020 is an international standard developed by CEN and ISO that specifies a quantitative chemical analysis method for determining the proportion of silk in textile mixtures containing silk combined with wool or other animal hair. This method utilizes 75% sulfuric acid to dissolve the silk component, enabling accurate measurement of its mass percentage after removing non-fibrous matter.

The standard is essential for quality control and verification in textile manufacturing, ensuring accurate fiber content identification in blended fabrics. It is widely recognized in Europe and globally, replacing the 2019 edition with technical revisions focused on animal hair mixtures.

Key Topics

• Scope: Quantification of silk mass percentage in mixtures with wool or other animal hair using sulfuric acid.
• Chemical Principle: Dissolution of silk fiber using sulfuric acid (75% concentration), leaving wool and other animal hair fibers intact for gravimetric analysis.
• Sample Preparation: Removal of non-fibrous matter before testing.
• Test Procedure:
  • Add sulfuric acid to sample in glass-stoppered conical flask.
  • Shake rigorously and allow standing periods at room temperature.
  • Filter and wash residue with dilute sulfuric acid, water, and dilute ammonia solution.
  • Dry and weigh residue to calculate silk content by difference.
• Precision: Measurement confidence limits are ±1 percentage point at 95% confidence level on homogeneous textile mixtures.
• Reagents and Apparatus:
  • 75% sulfuric acid prepared by diluting concentrated acid with water.
  • Dilute sulfuric acid and dilute ammonia solutions.
  • Glass apparatus including conical flasks and filter crucibles.
• Calculation: Follow ISO 1833-1 general principles for calculation and expression of results.

Applications

This standard is critical for:

• Textile Industry: Ensuring accurate labeling of silk-containing textile blends for consumer transparency, regulatory compliance, and market standards.
• Quality Assurance: Verifying raw material composition during manufacturing or before product shipment.
• Laboratories: Conducting reliable chemical fiber analysis on complex blends of natural protein fibers.
• Research and Development: Analyzing fabric blends to innovate or improve textile products with mixed fiber content.
• Regulatory Bodies: Enforcing textile product standards and preventing fraudulent claims about fiber composition.

Using SIST EN ISO 1833-18:2020 enhances confidence in fiber content data, which supports trade, product development, and consumer protection globally.

Related Standards

• ISO 1833-1: General principles of quantitative chemical analysis of textiles, referenced for test procedures and calculations.
• ISO 1833 Series: A comprehensive family of standards for chemical analysis of various textile fiber mixtures.
• ISO 1833-4: Methods using hypochlorite for mixtures of certain protein fibers, related to alternative chemical analysis approaches.
• Other EN ISO 1833 Parts: Cover quantitative chemical analysis for other fiber mixtures involving synthetic, cellulose, and protein fibers.

Keywords

Silk analysis, textile fiber quantification, sulfuric acid method, EN ISO 1833-18, silk-wool blends, animal hair fibers, quantitative chemical analysis, textile standards, CEN textile testing, fiber content determination, chemical dissolution of silk.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2020
Nadomešča:
SIST EN ISO 1833-18:2019
Tekstilije - Kvantitativna kemična analiza - 18. del: Mešanica svile z volno ali
drugimi živalskimi vlakni (metoda z uporabo žveplene kisline) (ISO 1833-18:2020)
Textiles - Quantitative chemical analysis - Part 18: Mixtures of silk with wool or other
animal hair (method using sulfuric acid) (ISO 1833-18:2020)
Textilien - Quantitative chemische Analysen - Teil 18: Mischungen aus Seide mit Wolle
oder anderen Tierhaaren (Verfahren mit Schwefelsäure) (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) (ISO 1833-18:2020)
Ta slovenski standard je istoveten z: EN ISO 1833-18:2020
ICS:
59.060.10 Naravna vlakna Natural fibres
71.040.40 Kemijska analiza Chemical analysis
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 1833-18
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2020
EUROPÄISCHE NORM
ICS 59.060.01 Supersedes EN ISO 1833-18:2019
English Version
Textiles - Quantitative chemical analysis - Part 18:
Mixtures of silk with wool or other animal hair (method
using sulfuric acid) (ISO 1833-18:2020)
Textiles - Analyse chimique quantitative - Partie 18: Textilien - Quantitative chemische Analysen - Teil 18:
Mélanges de soie avec de la laine ou d'autres poils Mischungen aus Seide mit Wolle oder anderen
animaux (méthode à l'acide sulfurique) (ISO 1833- Tierhaaren (Verfahren mit Schwefelsäure) (ISO 1833
18:2020) 18:2020)
This European Standard was approved by CEN on 19 October 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1833-18:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 1833-18:2020) 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 April 2021, and conflicting national standards shall be
withdrawn at the latest by April 2021.
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 1833-18:2019.
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 1833-18:2020 has been approved by CEN as EN ISO 1833-18:2020 without any
modification.
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 1833-18:2020(E)
©
ISO 2020
ISO 1833-18:2020(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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 1833-18:2020(E)
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 .
...