Janka hardness test

The Janka hardness test measures how resistant a wood surface is to denting and indentation. It works by placing a steel ball, usually 0.444 inches (11.28 mm) in diameter, into the wood with a specific amount of force. The test records the force required to push the ball halfway into the wood's surface. This value helps determine the wood's durability and suitability for flooring, furniture, or other uses where wear resistance is important. Higher Janka ratings indicate harder, more durable wood, while lower scores suggest softer material.