Janka hardness test

Rarity: Common

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At a glance

Class

Invention

Domain

Science and technology

Knowledge cost

4

In collections

Nobody has pulled it yet.

What Wikipedia says

The Janka hardness test (English: ; German: [ˈjaŋka]), created by Austrian-born American researcher Gabriel Janka (1864–1932), measures the resistance of a sample of wood to denting and wear.

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

Image: Nasa-verve (talk), CC BY 3.0, via Wikimedia Commons.