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 Kulcsár Janka Kulcsár Janka Kulcsár (born 8 April 1985) is a Hungarian pianist and répétiteur, and a founding member of the Moltopera Company. Janka Kulcsár was born on 8 April 1985 in Budapest. Kulcsár entered the Béla Bartók Conservatory at the age of fourteen. She participated frequently in summer courses during this period, like the International Music Camp in Balassagyarmat. At the age of eighteen she had already been a student of the Franz Liszt Academy of Music, coached by Lehel Both, at the age of twenty she won the 1st prize of the National Piano Competition for University Students. In