Overview
ISO 17186:2011 is an international standard that defines a precise method for determining the surface coating thickness of leather under zero compression conditions. This standard applies to all types of leather and provides a detailed procedure using microscopy techniques to measure the thickness of coatings applied on leather surfaces. Developed by the International Organization for Standardization (ISO) in collaboration with the International Union of Leather Technologists and Chemists Societies (IULTCS), ISO 17186:2011 ensures consistent and reliable measurement practices vital for quality control in leather manufacturing and processing industries.
Key Topics
- Scope and Applicability: ISO 17186:2011 addresses the determination of the surface coating thickness applied on leather, relevant for all leather types.
- Principle of Measurement: The standard specifies that a cross-sectional sample of leather is prepared and observed under a microscope. The thickness of the surface coating is measured perpendicular to the leather surface.
- Measurement Methods:
- Method A: Preferred method based on taking multiple equidistant measurements along the coating surface to calculate an average thickness, standard deviation, and confidence interval.
- Method B: Based on measurements using parallel lines aligned between peaks and troughs of the coating surface; does not support statistical evaluation.
- Equipment Requirements:
- Light microscope or scanning electron microscope capable of high magnification.
- Measurement tools such as calibrated grids, razor blades for sectioning, and sputter coating units for electron microscopy.
- Sample Preparation: Leather sections of approximately 10 mm x 10 mm are prepared, ideally from multiple hides or skins following ISO 2418 (sampling) and ISO 2419 (conditioning).
- Measurement Procedure: Detailed guidance on calibration, positioning, measuring under microscopes, and calculations to ensure accuracy.
- Data Expression: Thickness values are expressed both in micrometres and as a percentage of total leather thickness, aiding in product specification and quality assessment.
Applications
ISO 17186:2011 is critical for industries involved in leather goods manufacturing, including:
- Quality Control: Ensuring uniformity and compliance of surface coatings on leather used in footwear, upholstery, automotive interiors, and fashion accessories.
- Product Development: Assisting in testing new coating formulations and their application thickness to optimize durability, appearance, and performance.
- Material Research: Supporting laboratories in studying the physical properties of coated leather to enhance material science and processing techniques.
- Regulatory Compliance: Providing a standardized test method that facilitates international trade by ensuring that coated leather products meet agreed specifications.
This standard is especially useful where precise coating thickness impacts functionality such as waterproofing, abrasion resistance, and aesthetic finish.
Related Standards
For comprehensive leather testing and characterization, ISO 17186:2011 is often used alongside:
- ISO 2418: Sampling Location for Leather Testing – Guidance on representative sampling techniques.
- ISO 2419: Sample Preparation and Conditioning – Specifies preparation and environmental conditioning for testing.
- Other Leather Physical and Mechanical Tests – Standards for tensile properties, flexibility, and chemical fastness, ensuring a holistic assessment of leather materials.
These complementary standards ensure effective and reproducible testing outcomes, supporting quality assurance and compliance in the leather industry.
Keywords: ISO 17186, leather surface coating thickness, leather testing standard, microscopy measurement leather, leather physical tests, leather quality control, leather coating measurement, leather industry standards, IULTCS, leather sample preparation