A pencil is a marker, made ​​from a mixture of graphite, clay and a binder. This paste is forced through a small hole, dried, and baked. Many clay and graphite gives a somewhat hard pencil that gives a lighter and thinner line. Many graphite and little clay gives a soft pencil.
The wooden shell is usually light and soft cedar.

B = black (black), Blei: with a greater amount of graphite
F = firm (firm grip), Fein
H = hard, Heart
HB = hard, black