ASTM D3574 B1 is a testing specification that measures the indentation force deflection of urethane foam and foam-like substances. The test procedure below follows the publication’s listed compression ratios, but many users pick the rates that are important to their testing.
A universal tensile testing machine is needed to complete the test procedures. Force capacities at the two deflection points are recorded as well as the support factor and original thickness. Before conducting ASTM D3574 B1, it is important to read the entire specification in the relevant ASTM publication.