GB/T 39693.5-2025 in English

This standard specifies the method for determining the indentation hardness of rubber materials using a portable international rubber hardness tester. It outlines the procedures, equipment requirements, and test conditions necessary to ensure consistent and reliable measurements. The method is applicable for both vulcanized rubber and thermoplastic rubber. The standard provides detailed guidance on sample preparation, calibration of the testing instrument, and the interpretation of results. It also includes specifications for the testing environment and the handling of test specimens to minimize variability. The document aims to ensure that the measurement process is standardized and reproducible across different laboratories and testing facilities.