http://en.wikipedia.org/wiki/Pencil
I went to Wikipedia looking for clarification on pencil numbering (e.g. HB, 2B, etc.) and instead found a hidden history of monopoly and international competition, featuring cameos from Faber, Cont
http://en.wikipedia.org/wiki/Pencil
I went to Wikipedia looking for clarification on pencil numbering (e.g. HB, 2B, etc.) and instead found a hidden history of monopoly and international competition, featuring cameos from Faber, Cont