GB/T 39693.3-2021
ActiveRubber, vulcanized or thermoplastic—Determination of hardness—Part 3:Dead-load hardness using the very low rubber hardness (VLRH) scale
硫化橡胶或热塑性橡胶 硬度的测定 第3部分：用超低橡胶硬度（VLRH）标尺 测定定试验力硬度
Application Summary AI generated
This standard specifies the method for measuring the hardness of vulcanized or thermoplastic rubber using the very low rubber hardness (VLRH) scale under a dead-load force. It is applied in the rubber industry for quality control and product testing of soft rubber materials, such as seals, gaskets, and flexible components, where conventional hardness scales lack sensitivity. The method is particularly relevant for evaluating materials with hardness values below typical Shore A ranges, ensuring accurate characterization in manufacturing and laboratory settings.
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