ISO 2419:2012

Overview

ISO 2419:2012 is an international standard that specifies the preparation and conditioning of leather samples for physical and mechanical testing. Developed by ISO in collaboration with the International Union of Leather Technologists and Chemists Societies (IULTCS), this standard applies to all types of dry leather. It provides detailed guidelines on sample preparation, standardized atmospheres for conditioning, and testing environments to ensure reliable, reproducible results in leather quality assessment.

By following ISO 2419:2012, manufacturers, testers, and quality control professionals can maintain consistency in testing conditions, which is critical for evaluating leather's physical properties like strength, flexibility, and durability.

Key Topics

• Sample Preparation
  ISO 2419 defines the precise methods for preparing leather test specimens using standardized cutting tools (emporte-pièces). Test samples must be cut from the grain side (surface) of the leather where available, or alternatively from any face in the absence of grain, to ensure uniformity during testing.

• Conditioning Atmospheres
  The standard specifies several normal atmospheres - controlled temperature and humidity conditions - for sample conditioning before testing:

  • Reference Atmosphere: 23.0 °C temperature and 50% relative humidity
  • Specific Atmosphere: 20.0 °C temperature and 65% relative humidity
  • Tropical Atmosphere: 27.0 °C temperature and 65% relative humidity
    These atmospheres ensure that samples reach a stable moisture content and physical state before testing.

• Conditioning Duration and Setup
  Samples should be conditioned for a minimum of 24 hours on a support allowing air circulation around all faces to maintain consistent exposure to the conditioning atmosphere. Leather with high moisture content must be dried appropriately prior to conditioning.

• Testing Conditions
  Tests are to be performed in the same atmosphere as the conditioning phase unless otherwise specified. This maintains sample stability and ensures test results can be correlated accurately.

• Test Reporting Requirements
  Test reports must reference ISO 2419, specify any atmosphere used other than the reference, and note any deviations from the standard procedures.

Applications

ISO 2419:2012 is essential in industries and laboratories involved in:

• Leather Manufacturing: Ensuring quality control and product consistency across batches by standardizing how samples are prepared and conditioned before evaluating their mechanical properties.
• Product Development: Assisting in material selection and finishing process optimization based on reliable test data.
• Research and Development: Providing a standardized baseline for evaluating the impact of new treatments or tanning methods on leather performance.
• Compliance Testing: Enabling compliance with international regulations and customer specifications by adhering to recognized testing methodologies.
• Leather Goods Industry: Guaranteeing that physical tests on leather components (footwear, upholstery, garments) reflect true product performance under defined conditions.

Related Standards

• ISO 3376: Specifies tensile strength and elongation test methods for leather, often performed on samples prepared according to ISO 2419 standards.
• ISO 5403: Details sampling for physical and mechanical testing of leather, complementing sample preparation guidelines.
• IULTCS Physical and Mechanical Test Methods: The ISO 2419 standard aligns with methods adopted by IULTCS, ensuring global acceptance of testing protocols.
• ASTM Leather Testing Standards: While ASTM provides alternative methodologies, ISO 2419 remains a preferred reference globally for conditioning and sample preparation protocols.

Following ISO 2419:2012 ensures that leather physical and mechanical test results are accurate, reliable, and internationally recognized. It supports quality assurance and research efforts by harmonizing sample handling procedures essential for meaningful testing outcomes.

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