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.