Hardness

The experts at 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 can help predict 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. Some of the methods commonly use at Smithers Rapra include:

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

Sample Preparation

Our on-site sample preparation facilities are equipped to handle thickness reduction of rubber by slitting/buffing, ensuring that we are able to test a wide variety of materials and product forms.

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

Common Test Protocols

  • 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.