Overview
SIST EN ISO 17130:2021 is an internationally recognized standard specifying a reliable method to determine the dimensional change, or shrinkage, of leather resulting from ageing. Established by CEN and ISO in collaboration with the International Union of Leather Technologists and Chemists Societies (IULTCS), this standard applies to all categories of leather. It replaces the previous 2013 version, enhancing the testing procedure for more precise and consistent results in assessing leather dimensional stability after exposure to ageing conditions.
Key Topics
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Scope and Applicability: SIST EN ISO 17130:2021 covers the physical and mechanical test procedure focused on measuring shrinkage in leather due to artificial ageing. The method suits all types of leather, providing standardized results that assist in quality control and product development.
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Test Principle: The test involves conditioning leather samples, subjecting them to controlled ageing (heat, humidity, or cyclic conditions per ISO 17228), then measuring dimensional changes by comparing distances between marked reference points on the leather.
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Equipment and Materials:
- Oven or climate chamber conforming to ISO 17228 specifications.
- Precision vernier caliper for measurements to 0.1 mm accuracy.
- Stainless steel mesh or glass plate with polyester nonwoven fabric to support test samples.
- Press knife for preparing standard-size test pieces.
- Indelible marker or needle for marking measurement points.
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Sampling and Sample Preparation:
- Test pieces typically sized 150 × 150 mm, with marking points set 100 mm apart to form a square.
- Samples must be prepared following ISO 2418 and conditioned per ISO 2419 for at least 48 hours before testing.
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Testing Procedure:
- Initial measurements between reference points are recorded.
- Samples are artificially aged under predefined conditions.
- Post-ageing measurements are taken after a 24-hour reconditioning period.
- Visual inspection notes any distortions, changes in flexibility, or softness.
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Calculation of Shrinkage:
- Linear shrinkage percentage is calculated using average length measurements before and after ageing.
- Area shrinkage can also be determined by calculating the loss in surface area.
- Both results provide quantitative assessments that inform product quality evaluations.
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Test Reporting:
- The standard specifies comprehensive reporting requirements including sample details, test conditions, measured shrinkage values, and any observed visual changes.
Applications
SIST EN ISO 17130:2021 is essential for industries relying on leather quality and dimensional stability such as:
- Leather Tanning and Processing: To ensure ageing resistance and maintain product dimensions through manufacturing and use.
- Footwear and Leather Goods Manufacturing: To monitor leather shrinkage, guaranteeing dimensional accuracy and customer satisfaction.
- Automotive and Furniture Upholstery: Where leather durability and dimensional consistency influence performance and design longevity.
- Quality Control and Certification: For laboratories performing standardized tests ensuring compliance with client and regulatory requirements.
- Research and Development: To evaluate new leather treatments, finishes, or alternative tanning methods on material stability.
Related Standards
Key complementary standards referenced alongside SIST EN ISO 17130:2021 include:
- ISO 17228:2015 - Specifies the artificial ageing conditions used in this testing procedure.
- ISO 2418 - Details sampling locations on leather for consistent and representative test pieces.
- ISO 2419 - Provides guidelines on sample preparation and conditioning for physical and mechanical leather tests.
- ISO 105-B06 - Defines requirements for polyester nonwoven fabric used to support leather without adhesion during testing.
Adhering to SIST EN ISO 17130:2021 in conjunction with these standards ensures precise, repeatable, and internationally comparable results in leather dimensional change testing.
Keywords: SIST EN ISO 17130:2021, leather shrinkage test, leather dimensional change, leather ageing test, physical mechanical tests leather, leather quality control, leather testing standards, leather sample preparation, leather ageing effects.