Knoop hardness test

Rarity: Common

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At a glance

Class

Invention

Domain

Science and technology

Knowledge cost

1

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What Wikipedia says

The Knoop hardness test is a microhardness test – a test for mechanical hardness used particularly for very brittle materials or thin sheets, where only a small indentation may be made for testing purposes.

Excerpt from the Wikipedia article “Knoop hardness test”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Zimbres, CC BY-SA 2.5, via Wikimedia Commons.