Hardness is the resistance of a coating to a mechanical force, such as pressure, rubbing or scratching. In practice, different testing methods are used:
Pendulum Hardness
– In accordance with methods described by König and Persoz
Indentation Hardness
– Buchholz Indentation Testers
Scratch Hardness
– Hardness Meter Dur-O-Test
– Pencil Hardness
BYK-Gardner offers instrumentation needed to perform various hardness tests.