Overview
EN ISO 105-S02:1995 is an international standard developed by CEN that specifies a testing method for assessing the colour fastness of textiles when exposed to sulfur monochloride during the vulcanizing process. This standard is essential for determining how various textiles resist colour changes caused by sulfur monochloride vapour-a chemical commonly encountered in the cold vulcanizing of rubber. By following this method, manufacturers and quality control laboratories can ensure that textile materials maintain their colour integrity under industrial vulcanization conditions.
Key Topics
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Scope and Purpose
This standard applies to all types and forms of textiles and evaluates their resistance to colour change upon exposure to sulfur monochloride vapour. It reflects real-world conditions typical to rubber vulcanization processes.
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Testing Procedure
- The textile specimen is suspended in a heated exposure chamber at 50 °C with controlled airflow.
- Sulfur monochloride (S₂Cl₂) vapour is introduced inside the chamber for precisely 1 hour.
- After exposure, the specimen is neutralized using ammonium hydroxide vapour.
- Colour change is assessed before and after neutralization using the ISO 105-A02 grey scale for colour evaluation.
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Specimen Preparation
- Fabric specimens: 40 mm x 100 mm.
- Yarn specimens: knitted or wrapped to form fabric of equivalent size.
- Loose fibers: combed, compressed into sheets of 40 mm x 100 mm and sewn onto a cotton adjacent fabric for support (ISO 105-F).
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Apparatus and Reagents
- Heated exposure chamber with controlled dry airflow as per ISO 105-S02 specifications.
- Sulfur monochloride vapour, ideally yellow in colour to avoid decomposition-related errors.
- Ammonium hydroxide solution for neutralization.
- Grey scale for assessing colour change, aligned with ISO 105-A02.
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Reporting
Test reports must include:
- Standard reference and edition (ISO 105-S02:1993/EN ISO 105-S02:1995).
- Sample identification and detailed conditions.
- Numerical rating of colour change before and after neutralization.
Applications
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Textile Industry
This test method is critical for textile manufacturers and suppliers that provide fabrics for products subjected to rubber vulcanization. It ensures textile materials will maintain appearance and quality standards despite exposure to harsh vulcanizing chemicals.
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Rubber and Polymer Sector
Industries producing rubber goods that incorporate textile components can apply this standard for quality verification, guaranteeing product performance and durability in combined materials.
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Quality Control and Laboratory Testing
Testing laboratories utilize this standard to provide reliable, reproducible data on colour fastness properties, assisting in material selection and compliance with customer requirements.
Related Standards
- ISO 105-A01:1989 - General principles of testing colour fastness in textiles.
- ISO 105-A02:1993 - Grey scale for assessing change in colour.
- ISO 105-F:1985 - Standard adjacent fabrics used in colour fastness tests.
- Other parts of the ISO 105 series covering various aspects of colour fastness to different agents and conditions, helping provide a comprehensive colour durability profile for textile materials.
By adhering to EN ISO 105-S02:1995, stakeholders in the textile and rubber industries can benefit from a standardized, internationally recognized method for evaluating colour fastness, enabling better quality assurance, product development, and market acceptance. Keywords: colour fastness test, sulfur monochloride, vulcanization, textile testing standard, ISO 105-S02, textile colour durability, sulphur monochloride vapour exposure.