SIST EN ISO 3377-2:2026 – Standard & Testing Equipment

SIST EN ISO 3377-2:2026

Leather — Physical and mechanical tests — Part 2: Determination of double edge tear load

(Equivalent to ISO 3377-2:2025)

This standard specifies a laboratory method for determining the tear resistance of leather using the double edge (Baumann) tear method. It is applicable to all types of leather and provides reliable, reproducible tear-load data for quality evaluation and comparison.

Test Objective

To measure the maximum force required to propagate a tear in leather when subjected to controlled tensile loading using a standardized double-edge specimen and test fixture.

Test Principle

A rectangular leather specimen with a centrally shaped slit is mounted over turned-up steel tear holders. The specimen is pulled apart on a tensile testing machine at a constant speed until tearing occurs. The maximum tear force recorded during the test is used to evaluate tear resistance.

Required Testing Equipment

To perform testing in accordance with SIST EN ISO 3377-2:2026, the following equipment is required:

Universal Tensile Testing Machine

Equipped with appropriate load capacity and force-measuring accuracy of at least ±2 % (ISO 7500-1, Class 2), with a constant crosshead speed of 100 mm/min ± 20 mm/min.

Double Edge Tear Test Holders (Baumann Type)

Steel holders with standardized dimensions (10 mm ± 0.1 mm width, 2 mm ± 0.1 mm thickness), bent at right angles to ensure correct tearing geometry.

Specimen Cutting Die / Press Knife

Designed to cut test specimens in a single operation, ensuring consistent shape and slit geometry as required by the standard.

Thickness Measurement Gauge

Conforming to ISO 2589, used to measure leather thickness at the specified test point for optional tear strength calculation.

Standard Conditioning Chamber

Used to condition specimens in the standard atmosphere specified in ISO 2419 prior to testing.

Test Results

Test results are reported as:

Mean tear load (N) for specimens cut parallel and perpendicular to the backbone

Overall mean tear load

Optional tear strength (N/mm), calculated using mean thickness

Typical Applications

Incoming material inspection for leather manufacturers

Quality control in tanneries and finished leather production

Product development for footwear, garments, upholstery, and automotive leather

Supplier comparison and specification verification

Certification and compliance testing

Professional Instrument Manufacturer

Qinsun Instruments is a professional manufacturer of leather physical and mechanical testing equipment. We provide ISO-compliant test instruments and integrated testing solutions for leather laboratories.

Contact us for suitable equipment selection and technical support for SIST EN ISO 3377-2 testing.

2026-01-04 17:25