So, for better skin knife from unquenched spit than a knife, made of linen hacksaw. Dependence is simple: the higher the quenching and firmer metal, the greater the angle of sharpening him to do. At a lower angle of the blade blunts because crumble. Thus, the steel hardness 60 hrc can sharpen sharper than 45 . A spit of you make a thin knife-screed from 8 to 12 'and edge.. Read More