Hardness

Smithers Rapra have a wealth of experience in determining the hardness of polymeric materials in various forms.

Hardness and density of a rubber or polymeric material can influence the overall performance in and end use product. Measuring hardness levels provide a look at the ability of the material to recover after being indented through force. There are a variety of test methods commonly used to test and benchmark these results for full evaluation.

  • Shore A, Shore D and Shore M measurements
  • Macro and micro-IRHD measurements
Sample Preparation

The presence of our extensive sample preparation facilities which include the thickness reduction of rubbers by slitting/buffing ensures we are able to test a wide variety of materials and product forms.

Common Test Protocols

Smithers Rapra are ISO 17025 accredited to test rubber materials to BS ISO 48 (IRHD) and BS EN ISO 7619 (Shore A and D).

ASTM D2240 Standard Test Method for Rubber Property - Durometer Hardness

This standard is used to evaluate the hardness of a rubber sample with the use of a series of tests performed with a durometer. Hardness is measured when a force is applied to the sample with an indentor under specific conditions. The indentation hardness is then determined based on the elastic modulus and viscoelastic behavior of the sample.

Please contact us to discuss your needs, for more information or to request a quote.