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
 Rubberband
Rubber Band
  30 A
Computer Mouse Pad
Computer mouse pad
  40 A
 Inner tube
Inner tube
  50 A
 Pencil Eraser
Pencil eraser
  60 A
 Tire tread
Auto tire tread
  70 A
 Running shoe sole
Running shoe sole
  80 A
 Leather Belt
Leather belt
  90 A
  Phone cord
Phone cord / tap washer
100 A
  Skateboard wheel
Skateboard wheel
Shore D
  40 D
 Text book cover
Textbook cover
  50 D
 Golf ball
Golf ball
  60 D
  Desk top
Office desktop
  70 D
 Wooden ruler
Telephone/ Wooden ruler
  80 D
  Computer case
Computer casing
  90 D
  Bone
Bone