Overview
SIST EN ISO 105-G02:1999 – Textiles - Tests for Colour Fastness – Part G02: Colour Fastness to Burnt-Gas Fumes specifies a standardized method for determining the resistance of textile colours to atmospheric oxides of nitrogen, specifically as generated by the combustion of chemically pure butane gas. This color fastness test is applicable to textiles of all kinds and in all forms, with the exception of loose fibers. The test method measures how well dyed textiles retain their original colour when exposed to burnt-gas fumes, using a visual assessment based on the grey scale.
By following this internationally recognized procedure, textile manufacturers can accurately rate the colour fastness of dyes, ensuring consistent quality and product performance under exposure to polluted air environments.
Key Topics
- Scope of Application: The standard covers woven, knitted, and nonwoven textiles of all types, excluding loose fibers.
- Test Principle: Textiles and a pre-dyed control fabric are exposed to oxides of nitrogen (NOx) generated from burning chemically pure butane in a controlled chamber. The degree of colour change is compared to a standard reference using the grey scale.
- Assessment Tools:
- Grey Scale for assessing colour change
- Test control and standard of fading to ensure reliable comparison
- Test Conditions: Key parameters like temperature, humidity, exposure time, and gas concentration are controlled to simulate real-world atmospheric conditions, especially in urban environments where NOx levels are high.
- Reporting: Results are documented with details on the textile tested, conditions used, number of cycles, the method for humidity control, and observed changes.
Applications
- Product Development: Textile manufacturers use this method to evaluate the suitability of dyes and finishing processes for products intended for use in urban or industrial environments with high NOx pollution.
- Quality Assurance: The standard provides an objective basis for comparing the colour fastness of different materials or dye lots, enabling suppliers and buyers to specify performance requirements in contracts.
- Regulatory Compliance: Many international markets require proof of compliance with standards like ISO 105-G02 for textiles used in sensitive applications, such as clothing, upholstery, and automotive interiors.
- Performance Benchmarking: Test results help brands and retailers benchmark products, select appropriate materials, and inform consumers about expected product durability.
- After-care Assessment: The standard includes optional procedures for testing colour fastness after common cleaning procedures such as laundering and dry cleaning, simulating real-life product use.
Related Standards
- ISO 105-A01: Textiles – Tests for colour fastness – General principles of testing
- ISO 105-A02: Textiles – Tests for colour fastness – Grey scale for assessing change in colour
- ISO 105-C06: Textiles – Tests for colour fastness – Colour fastness to domestic and commercial laundering
- ISO 105-D01: Textiles – Tests for colour fastness – Colour fastness to dry cleaning
These related documents provide additional methods and guidance for evaluating textile durability under various conditions, ensuring a comprehensive framework for textile testing.
By rigorously applying SIST EN ISO 105-G02:1999, the textile industry can maintain high standards of product quality, improve consumer satisfaction, and enhance environmental resilience by producing materials that resist fading due to burnt-gas fumes. This standard is a vital tool for anyone involved in textile manufacturing, testing, procurement, and regulatory compliance.