Overview
SIST EN ISO 11642:2026 is a European and international standard that specifies a precise method for determining the colour fastness to water of leather. Prepared by the International Union of Leather Technologists and Chemists Societies (IULTCS) and adopted by the European Committee for Standardization (CEN), this standard applies to all types of leather at any stage of processing. Its primary objective is to ensure consistent, reliable assessments of colour fastness, an essential property that impacts the quality and durability of leather in various end uses.
The methods detailed in ISO 11642:2025 are applicable to finished and unfinished leather, supporting the quality control and product development requirements of the leather industry.
Keywords: Leather, colour fastness to water, ISO 11642, leather testing, colour fastness standard, SIST EN ISO 11642, water resistance leather, leather quality, EN ISO 11642, CEN
Key Topics
Core Elements of Colour Fastness Testing:
- Test Principle: Leather and adjacent fabric are soaked in demineralized water and pressed together under specified conditions. After treatment and drying, the colour change in leather and staining on the fabric are assessed using grey scales.
- Scope of Application: The methodology covers all kinds of leather at any processing stage, ensuring that both finished and unfinished leathers can be evaluated.
- Apparatus and Materials: Standardized equipment, such as a special press and grey scales for assessment, ensures repeatable and comparable results.
- Test Reporting: Detailed reporting essentials include the type and condition of the leather, description of adjacent fabrics, grey scale results for both staining and colour change, and any deviations from the standard procedure.
Importance of Consistency:
- Incorporates references to complementary ISO standards, such as ISO 7906 for general principles and ISO 105 series for assessment tools and adjacent fabrics, promoting methodological alignment and accuracy.
Applications
Quality Assurance and Product Development:
- Manufacturers of Finished Leather Goods: Footwear, furniture, automotive interiors, and fashion accessories all benefit from verifying that leather maintains its appearance and does not bleed or fade upon exposure to water.
- Leather Processors and Tanneries: Routine testing during manufacturing helps identify process adjustments required to enhance colour fastness, ensuring compliance with industry and customer standards.
- Testing Laboratories: Standardized methods enable independent labs to deliver comparable, reliable results to clients across different countries and applications.
- Retailers and Brand Owners: Ensuring products meet ISO 11642 requirements helps maintain brand reputation by reducing customer complaints and returns related to colour loss or staining.
International Market Access:
- Adoption of SIST EN ISO 11642:2026 facilitates global trade in leather and finished leather products by harmonizing test methods, supporting regulatory compliance and customer expectations worldwide.
Related Standards
For comprehensive leather testing and quality control, the following related standards are frequently referenced alongside SIST EN ISO 11642:2026:
- ISO 7906: Leather – Tests for colour fastness – General principles of testing
- ISO 105-A02 to A05: Textiles – Tests for colour fastness – Grey scales and instrumental assessment methods for change in colour and staining
- ISO 105-F01 to F10: Textiles – Tests for colour fastness – Specifications for different types of adjacent fabrics (e.g., cotton, polyester, multifibre)
- ISO 2418: Leather – Preparation of specimens for testing
- ISO 3696: Water for analytical laboratory use – Specification and test methods
Manufacturers, testing laboratories, and regulatory authorities rely on SIST EN ISO 11642 and these related standards to maintain rigorous quality, ensure product durability, and meet international benchmarks in leather production and evaluation.