BS 903 Part. A 26 is a British Standard that specifies a method for determining the compression set of rubber and rubber-like materials. The compression set is the amount of deformation or residual deformation that remains in a material after it has been compressed and then released. Such kind of test method involves subjecting a rubber sample to a specified compression force and then measuring the amount of residual deformation after a specified time period.

The test is mostly carried out at elevated temperatures, such as 70°C or 100°C. These conditions can accelerate the aging process and make it easier to detect changes in the compression set over time. The compression set test is often used to evaluate the performance of rubber materials in applications where the material will be subjected to compression and then released, such as gaskets, seals, and other mechanical components.

BS 903 Part. A 26 is one of several standards that are used to test the properties of rubber and rubber-like materials, and it is widely recognized in the UK and other countries.

NextGen’s Classic Analogue Shore Durometer complies with BS 903 Part. A 26 standard.

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