ISO 105-X11:2026

Textiles — Tests for colour fastness — Part X11: Colour fastness to hot pressing

This document specifies a method for determining the resistance of the colour of textiles of all kinds and in all forms to ironing and to processing on hot cylinders. This document is applicable for hot pressing when the textile is dry, damp or wet which is determined by the end-use of the textile.

Textiles — Essais de solidité des coloris — Partie X11: Solidité des coloris au pressage à chaud

1.1 La présente partie de l'ISO 105 prescrit une méthode pour la détermination de la résistance des teintures sur les textiles de toute nature, à tous leurs stades de transformation, au repassage ou au traitement industriel sur cylindres chauds. 1.2 Des essais sont prévus pour le repassage à chaud lorsque le textile est sec, lorsqu'il est mouillé et lorsqu'il est humide. La destination finale du textile détermine généralement quel essai doit être effectué.

General Information

• Status: Published
• Publication Date: 16-Jun-2026
• ICS: 59.080.01 - Textiles in general
• Technical Committee: ISO/TC 38/SC 1 - Tests for coloured textiles and colorants
• Drafting Committee: ISO/TC 38/SC 1 - Tests for coloured textiles and colorants
• Current Stage: 6060 - International Standard published
• Start Date: 17-Jun-2026
• Due Date: 07-Nov-2026
• Completion Date: 17-Jun-2026

Relations

• Consolidates: prEN ISO 105-X11 - Textiles - Tests for colour fastness - Part X11: Colour fastness to hot pressing (ISO/DIS 105-X11:2024)
• Effective Date: 12-Feb-2026
• Consolidates: ISO 7902-1:2020 - Hydrodynamic plain journal bearings under steady-state conditions — Circular cylindrical bearings — Part 1: Calculation procedure
• Effective Date: 18-Nov-2023
• Revises: ISO 105-X11:1994 - Textiles — Tests for colour fastness — Part X11: Colour fastness to hot pressing
• Effective Date: 11-Nov-2023

Overview

ISO 105-X11: Textiles - Tests for Colour Fastness - Part X11: Colour Fastness to Hot Pressing is an international standard developed by ISO’s Technical Committee on Textiles. This document specifies test methods for evaluating the resistance of textile colours to hot pressing, such as during ironing or processing on hot cylinders. It applies to textiles of all kinds-fibres, yarns, fabrics, and finished products-assessing their colour fastness performance when dry, damp, or wet. The need for this test is driven by real-world scenarios, as the end-use of the textile determines which hot pressing simulation is most relevant.

Testing for colour fastness to hot pressing is essential for ensuring quality in textile manufacturing and delivering products that retain their intended appearance throughout their lifecycle. The standard helps manufacturers, quality control laboratories, and retailers demonstrate compliance and maintain customer satisfaction regarding durability and appearance of dyed and printed textiles.

Key Topics

ISO 105-X11 covers several critical areas associated with colour fastness testing:

• Hot Pressing Conditions: Procedures simulate conditions where textiles are subject to ironing or hot cylinder processing in dry, damp, and wet states. Each condition is individually tested based on likely end-use.
• Test Apparatus: The standard details the use of heating devices with smooth parallel plates, precise temperature control, and specific pressure (4 kPa ± 1 kPa). It provides for alternate use of a household iron with suitable measurement of temperature and pressure.
• Temperature Range: Three main pressing temperatures-120°C, 160°C, and 210°C-are established, allowing for adaptation according to textile fibre type and construction.
• Sample Preparation: Standardized test specimens ensure consistency, whether the material under test is fibre, yarn, or fabric.
• Grey Scale Assessment: Specimens are evaluated both immediately and after exposure to air using established ISO grey scales for assessing colour change and staining.
• Reporting Requirements: The standard mandates comprehensive reporting of test conditions, results, method deviations, and observations, supporting traceability and transparency.

Applications

ISO 105-X11 is widely applied across the textile supply chain for:

• Quality Assurance: Ensuring dyed or printed textiles maintain their designed colour integrity during ironing or other hot pressing situations encountered in manufacturing or consumer use.
• Product Development: Supporting textile engineers and designers in selecting dyes and processes that enhance resistance to colour change and staining during heat treatments.
• Laboratory Testing: Providing a reproducible method for textile testing laboratories to benchmark products against international requirements.
• Retail and Distribution: Helping importers, brands, and retailers set and verify product specifications related to consumer care and performance.

Example scenarios include testing garments, home textiles, upholstery, and technical fabrics to prevent colour loss or migration during ironing or industrial finishing. This is vital for consumer satisfaction, regulatory compliance, and brand reputation.

Related Standards

ISO 105-X11 forms part of the broader ISO 105 series for colour fastness testing, closely linked to the following standards:

• ISO 105-A01: General principles of testing
• ISO 105-A02: Grey scale for assessing change in colour
• ISO 105-A03: Grey scale for assessing staining
• ISO 105-F02: Specification for cotton and viscose adjacent fabrics
• ISO 105-P01: Colour fastness to dry heat, excluding pressing
• ISO 139: Standard atmospheres for conditioning and testing textiles
• ISO 3696: Water for analytical laboratory use

Together, these documents provide a comprehensive framework for assessing the colour fastness of textiles under various physical and chemical exposures, enhancing the reliability and international comparability of test results.

Keywords: ISO 105-X11, textiles, colour fastness, hot pressing, ironing, standards, textile testing, colour change, staining, laboratory methods, textile quality.

Standards Content (Sample)

International
Standard
ISO 105-X11
Fifth edition
Textiles — Tests for colour
2026-06
fastness —
Part X11:
Colour fastness to hot pressing
Textiles — Essais de solidité des coloris —
Partie X11: Solidité des coloris au pressage à chaud
Reference number
© ISO 2026
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
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Phone: [phone]
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Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
4.1 Dry pressing .1
4.2 Damp pressing .2
4.3 Wet pressing .2
4.4 Assessment .2
5 Apparatus . 2
6 Test specimen . 3
7 Procedure . 3
7.1 General .3
7.2 Dry pressing .3
7.3 Damp pressing .3
7.4 Wet pressing .4
7.5 Assessment .4
8 Test report . 4
Bibliography . 5

iii
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 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 38, Textiles, Subcommittee SC 1, Tests for
coloured textiles and colorants, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 248, Textiles and textile products, in accordance with the Agreement on
technical cooperation between ISO and CEN (Vienna Agreement).
This fifth edition cancels and replaces the fourth edition (ISO 105-X11:1994), which has been technically
revised.
The main changes are as follows:
— in subclause 7.1.1, the pressing temperatures have been changed to 120 °C, 160 °C and 210 °C, instead of
110 °C, 150 °C and 200 °C, in line with the ISO 3758:2023.
A list of all parts in the ISO 105 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
International Standard ISO 105-X11:2026(en)
Textiles — Tests for colour fastness —
Part X11:
Colour fastness to hot pressing
1 Scope
This document specifies a method for determining the resistance of the colour of textiles of all kinds and in
all forms to ironing and to processing on hot cylinders.
This document is applicable for hot pressing when the textile is dry, damp or wet which is determined by the
end-use of the textile.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
...