The test results in this report are based on the ASTM D1037 Janka Ball test. The Janka test is a measure used to determine the strength and durability of wood and bamboo flooring based on the amount of force required to indent the floor. The Janka hardness of bamboo flooring tends to vary a bit as it does with some wood species. Due to the thickness of available specimens its accuracy is somewhat greater on wood than bamboo. The test measures the force required to embed an 11.28 millimeter (0.444 inch) steel ball into wood half its diameter (0.222 inch) deep. This method was chosen so that the result would leave an indentation 100 square millimeters in size. Janka is one of the best measures to determine the hardness and durability of wood species.
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