Indentation refers to the small depression or mark that is made on the surface of the material being tested by the indenter of the durometer. The indentation is produced by applying a specified load force to the material for a specified period of time, typically a few seconds.

The depth of the indentation is measured, typically in units of millimetres or thousandths of an inch, and is used to calculate the material’s hardness value. Different Shore scales use different depth measurements and formulas to determine hardness values, but in general, harder materials will produce shallower indentations, while softer materials will produce deeper indentations.

The indentation that is produced by the durometer is typically quite small, typically less than a millimetre in diameter. However, it is important to ensure that the indentation is uniform and consistent from test to test in order to obtain accurate and reliable hardness measurements.

NextGen’s Classic Analogue Shore Durometer system indentation depth is 2.5mm.

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