1. Scratch hardness testing
1.1 Mohs scale
Historically, this is the oldest method of measuring hardness: a body is harder than another if it can scratch it. It was used by Réaumur, then by Mohs, who proposed the first mineral hardness scale (table 1 ): each mineral scratches those below it. The minerals indicated have been selected to lead to comparable hardness intervals between two consecutive elements.
SCROLL TO TOP1.2 Stripe sclerometer
In order to clarify the notion of hardness...
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Scratch hardness testing
Rebound hardness testing
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