Hardness

Hardness, or Shore Hardness, is a measure of a material's hardness to arbitrary standard values.

We measure hardness with Shore hardness gauges. These gauges impress a point into a surface under spring load. The gauge measures the resistance to the point's penetration. Harder materials are usually measured with a Shore Type "D" gauge, softer materials with a Shore Type "A" gauge, and very soft materials with a Shore Type "OO" gauge. See also “Durometer”.

Epic uses test method ASTM D2240.