SIST EN ISO 2420:2017

Overview

SIST EN ISO 2420:2017 is an internationally recognized standard published by CEN that specifies a standardized method for determining the apparent density and mass per unit area of leather. Applicable to all types of leather, this standard ensures consistent and reliable measurement parameters for physical and mechanical testing within the leather industry. It supersedes the earlier EN ISO 2420:2002, incorporating technical revisions and updated testing procedures.

Key Topics

This standard focuses on precise measurement techniques and includes:

• Sampling and sample preparation: Guidance on how to properly cut test pieces from leather samples, ensuring representative and reproducible results as per ISO 2418 and ISO 2419.
• Measurement of thickness: Using a thickness gauge conforming to ISO 2589, the leather thickness is measured at multiple points to calculate an accurate average.
• Dimensional measurement: Both circular and square leather test pieces can be used. Dimensions are carefully measured with Vernier callipers to ensure precision.
• Mass measurement: Test piece mass is determined using a balance accurate to 0.001 g.
• Calculation formulas: The standard defines formulas to calculate apparent density (kg/m³) and mass per unit area (g/m²), accounting for either cylindrical or cuboid test piece shapes.
• Test conditions: Conducting all measurements under standardized atmospheric conditions is emphasized for accuracy.
• Test report requirements: Reports must include reference to ISO 2420:2017 and provide mean apparent density values with significant figures.

Applications

SIST EN ISO 2420:2017 is essential for:

• Leather manufacturers and processors requiring precise quality control and product characterization.
• Leather technologists and laboratories conducting physical testing to validate specifications and product performance.
• Product developers aiming to ensure consistent leather properties in goods such as footwear, upholstery, and leather goods.
• Compliance and certification bodies enforcing standard testing to guarantee conformity with industry norms. By standardizing how apparent density and mass per unit area are measured, this document helps improve transparency, comparability, and trust across the leather supply chain.

Related Standards

This standard references and aligns with other key ISO and EN standards in the leather testing domain, including:

• ISO 2418 - Leather sampling locations for standardized testing.
• ISO 2419 - Preparation and conditioning of leather samples prior to testing.
• ISO 2589 - Method for determination of leather thickness.
• EN 15987 - Leather terminology providing key definitions used in this and related standards. The synergy of these standards ensures comprehensive, harmonized testing methods for accurate leather material characterization.

Keywords: SIST EN ISO 2420:2017, leather testing standard, apparent density of leather, mass per unit area leather, physical tests leather, mechanical tests leather, leather quality control, ISO leather standards, leather thickness measurement, leather sample preparation.