EN ISO 20701:2024
(Main)Leather - Tests for colour fastness - Colour fastness to saliva (ISO 20701:2024)
Leather - Tests for colour fastness - Colour fastness to saliva (ISO 20701:2024)
This document specifies a method for determining the colour fastness to saliva of all kinds of leathers, independent of the colouring procedure applied.
The method uses an artificial saliva solution to simulate whether colouring materials can migrate from leather to the mouth or to the mucous membranes.
Leder - Prüfung der Farbechtheit - Farbechtheit gegenüber Speichel (ISO 20701:2024)
Dieses Dokument legt ein Verfahren zur Bestimmung der Farbechtheit gegen Speichel bei allen Lederarten unabhängig vom Färbevorgang fest.
Das Verfahren nutzt eine künstliche Speichellösung, um zu simulieren, ob Farbstoffe vom Leder zum Mund oder zu den Schleimhäuten migrieren können.
Cuir - Essais de solidité des coloris - Solidité des coloris à la salive (ISO 20701:2024)
Le présent document spécifie une méthode permettant de déterminer la solidité des coloris à la salive, destinée à tous les types de cuirs, quelle que soit la technique de teinture utilisée.
Cette méthode consiste à utiliser une solution de salive artificielle afin de déterminer si les matières colorantes peuvent migrer du cuir vers la bouche ou les muqueuses.
Usnje - Preskušanje barvne obstojnosti - Barvna obstojnost na slino (ISO 20701:2024)
Standard ISO 20701 | IUF 427:2017 določa metodo za ugotavljanje barvne obstojnosti na slino za usnje vseh vrst, neodvisno od uporabljenega postopka obarvanja.
Metoda uporablja raztopino umetne sline za simulacijo, s katero se ugotavlja, ali se lahko barvni materiali prenesejo iz usnja v usta ali sluznico.
General Information
Relations
Overview
EN ISO 20701:2024 is an international standard developed by CEN and IULTCS that specifies a standardized test method for assessing the colour fastness of leather to saliva. This test is crucial for determining whether dyes or colouring agents used in leather products can migrate when exposed to saliva. The method employs an artificial saliva solution to simulate real-life exposure, ensuring that leather used in products such as footwear, gloves, and other items in contact with the mouth or mucous membranes is safe and maintains its colour integrity.
Key Topics
- Scope: Applies to all types of leather regardless of the colouring procedure used, ensuring broad applicability across the leather industry.
- Test Principle: A filter paper soaked in artificial saliva is placed in contact with the leather sample at 37 ± 2 °C for 120 ± 5 minutes. The assessment involves visual evaluation of colour change on the leather and staining on the filter paper using grey scale methods.
- Artificial Saliva Composition: The artificial saliva solution is carefully formulated using specific salts such as magnesium chloride, calcium chloride, potassium phosphate, and others to mimic the chemical environment of human saliva with a pH of 6.8 ± 0.1.
- Materials and Equipment: Includes filter paper, adhesive tape, desiccator, oven, pH meter, and standard grey scales for staining and colour change rating, enabling consistent and reproducible results.
- Standardized Procedure: Detailed steps cover specimen preparation, filter paper application, incubation conditions, drying procedures, and evaluation criteria to ensure consistency in testing across laboratories.
- Reference to Related ISO Standards: The standard aligns with ISO 7906 for general colour fastness principles, ISO 2418 for specimen preparation, and ISO 105 series for grey scale assessments, ensuring harmonized methodologies.
Applications
- Leather Quality Control: Manufacturers use this test to verify the durability and safety of dyed leather in products that may come into contact with saliva, such as gloves, footwear linings, upholstery, and wearable accessories.
- Consumer Safety: Ensures that toxic or harmful dyes do not leach from leather to the mouth, protecting consumers from potential health risks.
- Compliance and Certification: Helps tanneries and product designers meet national and international regulations on material safety and product quality, facilitating market access globally.
- R&D for Leather Treatments: Enables research into improved dye fixation techniques and finishes that enhance resistance to colour migration under realistic exposure conditions.
Related Standards
- ISO 7906 – Leather tests for colour fastness: general principles of testing, providing foundational methodologies.
- ISO 2418 – Leather: chemical, physical, mechanical, and fastness tests specimen preparation and positioning.
- ISO 105-A02 & ISO 105-A03 – Grey scales for assessing colour change and staining essential for interpreting the test results accurately.
- ISO 3696 – Specifies the quality of water used in test solutions to maintain reproducibility and accuracy.
- EN 15987 & ISO 15115 – Define leather terminology relevant to the testing processes for common understanding.
EN ISO 20701:2024 plays a vital role in leather product development and quality assurance by providing a reliable method to ensure colour fastness to saliva, emphasizing consumer safety and product durability. Its wide recognition and harmonization with other international standards make it a cornerstone for professionals involved in leather testing, certification, and manufacturing industries.
Frequently Asked Questions
EN ISO 20701:2024 is a standard published by the European Committee for Standardization (CEN). Its full title is "Leather - Tests for colour fastness - Colour fastness to saliva (ISO 20701:2024)". This standard covers: This document specifies a method for determining the colour fastness to saliva of all kinds of leathers, independent of the colouring procedure applied. The method uses an artificial saliva solution to simulate whether colouring materials can migrate from leather to the mouth or to the mucous membranes.
This document specifies a method for determining the colour fastness to saliva of all kinds of leathers, independent of the colouring procedure applied. The method uses an artificial saliva solution to simulate whether colouring materials can migrate from leather to the mouth or to the mucous membranes.
EN ISO 20701:2024 is classified under the following ICS (International Classification for Standards) categories: 59.140.30 - Leather and furs. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 20701:2024 has the following relationships with other standards: It is inter standard links to EN ISO 20701:2018. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN ISO 20701:2024 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2024
Usnje - Preskušanje barvne obstojnosti - Barvna obstojnost na slino (ISO
20701:2024)
Leather - Tests for colour fastness - Colour fastness to saliva (ISO 20701:2024)
Leder - Prüfung der Farbechtheit - Farbechtheit gegenüber Speichel (ISO 20701:2024)
Cuir - Essais de solidité des coloris - Solidité des coloris à la salive (ISO 20701:2024)
Ta slovenski standard je istoveten z: EN ISO 20701:2024
ICS:
59.140.30 Usnje in krzno Leather and furs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 20701
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2024
EUROPÄISCHE NORM
ICS 59.140.30 Supersedes EN ISO 20701:2018
English Version
Leather - Tests for colour fastness - Colour fastness to
saliva (ISO 20701:2024)
Cuir - Essais de solidité des coloris - Solidité des coloris Leder - Prüfung der Farbechtheit - Farbechtheit
à la salive (ISO 20701:2024) gegenüber Speichel (ISO 20701:2024)
This European Standard was approved by CEN on 16 August 2024.
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, Türkiye 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20701:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 20701:2024) has been prepared by Technical Committee IULTCS "International
Union of Leather Technologists and Chemists Societies" in collaboration with Technical Committee
CEN/TC 289 “Leather” the secretariat of which is held by UNI.
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 2025, and conflicting national standards
shall be withdrawn at the latest by February 2025.
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 20701:2018.
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 website.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 20701:2024 has been approved by CEN as EN ISO 20701:2024 without any modification.
International
Standard
ISO
IULTCS
IUF 427
Second edition
Leather — Tests for colour fastness
2024-08
— Colour fastness to saliva
Cuir — Essais de solidité des coloris — Solidité des coloris à la salive
Reference numbers
ISO 20701:2024(en)
IULTCS/IUF 427:2024(en) © ISO 2024
ISO 20701:2024(en)
IULTCS/IUF 427:2024(en)
© ISO 2024
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 20701:2024(en)
IULTCS/IUF 427:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus and materials . 2
6 Reagents . 2
7 Leather specimen and test pieces . 3
8 Procedure . 3
9 Ev a luat ion . 3
10 Precision . 4
11 Test report . 4
iii
ISO 20701:2024(en)
IULTCS/IUF 427:2024(en)
Foreword
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