Hardness Comparisons

Durometer measures the hardness in polymers, elastomers and rubbers. Hardness may be defined as a material's resistance to permanent indentation. The durometer scale was defined by Albert F. Shore, who developed a measurement device called a durometer in the 1920s. A chart showing general hardness comparisons is below. Some of HAPCO's materials are available in both Shore A and Shore D.

Shore A   20 A   Rubber Band   30 A Computer mouse pad   40 A   Inner tube   50 A   Pencil eraser   60 A   Auto tire tread   70 A   Running shoe sole   80 A   Leather belt   90 A   Phone cord / tap washer 100 A   Skateboard wheel Shore D   40 D   Textbook cover   50 D   Golf ball   60 D   Office desktop   70 D   Telephone/ Wooden ruler   80 D   Computer casing   90 D   Bone

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