did you know that hb stands for hardness and blackness. interestingly the word “pencil” may have come from the latin word pencillus which means little tail. this word might also be thought to refer to the word penis, which might also mean little tail, but not writing implement. supposedly.
there is a scale which moves from hardness to blackness
[talking about pencils here, not penii] [i think]
9H 8H 7H 6H 5H 4H 3H 2H H F HB B 2B 3B 4B 5B 6B 7B 8B 9B
note that HB is the standard writing pencil