Shore durometer

Common card · No. 290886

The Shore durometer is a device for measuring the hardness of a material, typically of polymers. Higher numbers on the scale indicate a greater resistance to indentation and thus harder materials. Lower numbers indicate less resistance and softer materials. Note that 'hardness' here is used in the colloquial sense, since a Shore durometer measures resistance to any localized deformation, in contrast with the technical definition (used in the article on hardness), which only concerns resistance to localized plastic deformation. The term is also used to describe a material's rating on the scale, as in an object having a "'Shore durometer' of 90." The scale was defined by Albert Ferdinand Shore, who developed a suitable device to measure hardness in the 1920s. It was neither the first hardness tester nor the first to be called a durometer (ISV duro- and -meter; attested since the 19th century), but today that name usually refers to Shore hardness; other devices use other measures, which return...

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