ISO 22195-9:2026

• Abstract:

  This document specifies a test method for the determination of the index ingredient of chemicals in coloured textile dyed with gallnut. Gallnut can be applied to both natural fibre and manufactured fibre.

• Status: Published
• Publication Date: 25-Aug-2026
• ICS: 59.080.01 - Textiles in general
• Technical Committee: ISO/TC 38 - Textiles
• Drafting Committee: ISO/TC 38/WG 31 - Natural material for textiles
• Current Stage: 6060 - International Standard published
• Start Date: 26-Aug-2026
• Due Date: 05-Feb-2027
• Completion Date: 26-Aug-2026

Overview

ISO 22195-9:2026 - Textiles - Determination of index ingredient from coloured textile - Part 9: Gallnut provides a standardized test method for verifying the presence of gallnut-based dyes in coloured textiles. Developed by ISO Technical Committee 38 (Textiles), this standard enables laboratories, manufacturers, and quality assurance professionals to accurately detect the primary gallnut ingredient, gallic acid, in both natural and manufactured fibre textiles. The standard addresses the growing demand for authentication and traceability of natural colourants in textile products, enhancing supply chain transparency and consumer trust.

Key Topics

• Gallnut-based Colourants: Focuses on textiles dyed using gallnut, a natural dye source high in tannins, particularly gallic acid.
• Test Principle: Utilizes High-Performance Liquid Chromatography (HPLC) with a photodiode array (PDA) detector for the identification and quantification of gallic acid.
• Sample Preparation: Involves precise sample cutting, methanol extraction, and analytical preparation to optimize detection sensitivity.
• Apparatus and Reagents: Specifies analytical balances, borosilicate glass containers, ultrasonic baths, and other laboratory equipment needed for reproducible results.
• Reporting Requirements: Outlines documentation of analysis conditions, detection results, sample identification, and deviations from prescribed procedures.

Applications

ISO 22195-9:2026 delivers practical value across several areas of the textile industry and research sectors:

• Authentication of Natural Dyes: Enables verification whether gallnut dyes are present, supporting claims of natural or eco-friendly textile products.
• Quality Assurance: Assists dye houses, textile manufacturers, and importers in verifying ingredient claims and complying with environmental or labeling regulations.
• Forensic and Conservation Science: Useful for the analysis of historical textiles, works of art, manuscripts, and other artefacts where identifying original dye components is crucial.
• Research and Development: Facilitates innovation in sustainable and natural dye applications by providing a reliable method for tracking gallnut-derived colourants.

By standardizing the detection of gallnut-based dyes, ISO 22195-9 helps stakeholders address growing consumer interest in sustainable materials and supports industry best practices in transparency and traceability.

Related Standards

For comprehensive coverage and best practice, users may consider related standards:

• ISO 22195 Series: Other parts in this series address the determination of index ingredients from different natural and synthetic colourants in textiles.
• ISO 3696: Specification and test methods for laboratory water used in the preparation and analysis.
• ISO/IEC Directives: Editorial and procedural guidance for implementing ISO standards.

Consulting these standards alongside ISO 22195-9:2026 ensures robust, harmonized approaches for dye identification and chemical analysis in textile testing laboratories.

Summary

ISO 22195-9:2026 is a key international standard for detecting gallnut-derived gallic acid in dyed textiles, supporting authenticity claims and quality assurance throughout the textile supply chain. By adhering to this method, organizations can confidently substantiate the use of natural dyes, align with sustainability initiatives, and meet regulatory and consumer expectations. The standard’s precise, reproducible approach strengthens the credibility and traceability of coloured textile products worldwide.

International
Standard
ISO 22195-9
First edition
Textiles — Determination of index
2026-08
ingredient from coloured textile —
Part 9:
Gallnut
Textiles — Détermination d'indicateurs d'ingrédients de textiles
colorés —
Partie 9: Galle
Reference number
© ISO 2026
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
6 Apparatus . 2
7 Procedure . 2
8 Test report . 3
Annex A (informative) Example of test result . 4

iii
Foreword
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This document was prepared by Technical Committee ISO/TC 38, Textiles.
A list of all parts in the ISO 22195 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
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iv
Introduction
Dyeing has been a part of textile production, imparting colour and enhancing fabric aesthetics. Before
the development of synthetic dyes, natural materials, such as plant extracts, minerals and insect-derived
colourants, were widely used. When dyeing fabrics using materials derived from these natural substances, it
becomes necessary to identify which substances the colourant was derived from.
Gallnut, known for its high tannin content, has been traditionally used as a natural dye. To ensure authenticity,
standardized test methods are necessary for identifying gallnut-derived colourants in dyed textiles. This
document outlines a method for determining index ingredients from gallnut-based dyes, providing a reliable
approach for verification and quality assurance in naturally dyed fabrics.

v
International Standard ISO 22195-9:2026(en)
Textiles — Determination of index ingredient from coloured
textile —
Part 9:
Gallnut
1 Sc
...