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. It measures the force required to embed an 11.28-millimeter-diameter (7⁄16 in) steel ball halfway into a sample of wood.
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. It measures the force required to embed an 11.28-millimeter-diameter (7⁄16 in) steel ball halfway into a sample of wood.
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