Janka hardness test Janka hardness test The Janka hardness test (from the Austrian-born emigrant Gabriel Janka, 1864-1932) measures the resistance of a sample of wood to denting and wear. It measures the force required to embed an diameter steel ball halfway into a sample of wood. A common use of Janka hardness ratings is to determine whether a species is suitable for use as flooring. The hardness of wood varies with the direction of the wood grain. Testing on the surface of a plank, perpendicular to the grain, is said to be of "side hardness". Testing the cut surface of a stump is
Janka, Contai Khejuri I and Khejuri II CD Blocks. It covers an area of 268.47 km with a population of 231,777. Janka, Contai Janka is a village, in Khejuri II CD Block in Contai subdivision of Purba Medinipur district in the state of West Bengal, India. Khejuri police station is located at Janka. The headquarters of Khejuri II CD Block are located at Janka. As per 2011 Census of India Janka had a total population of 2,804 of which 1,452 (52%) were males and 1,352 (48%) were females. Population below 6 years was 347. The total number of literates in Janka was