The graphite pencil scale is a system that grades pencils according to how hard the pencil lead is and how dark or black is the mark that it produces on the paper. The gradings on the scale are sometimes referred to as degrees of hardness and currently, there are 24 degrees on the graphite pencil scale ranging from 10H -12B.
In this guide we explain why there are 24 degrees of Hardness on the Graphite Pencil Scale, what are H & B & how this relates to the U.S Pencil Hardness Scale. As well as what percentage of graphite is in pencil.
