Pencils are classified according to their morphology: "log penholder", "sharpened penholder", "hooded pencil". According to the hardness of the lead of the pencil, it includes class H pencils, class B pencils, and class HB pencils. According to the process classification can be divided into: traditional pencil and automatic pencil.

Pencil, is a kind of pen used for writing and drawing sketch, has a history of more than four hundred years, among which, drawing sketch pencil is divided into many types, it is divided into three stages of development, graphite, wooden penholder, cap pencil; In addition, its color has red and white, black and white, yellow and black stripes.

The hardness mark of the lead of a pencil is generally "H" for hard pencils, "B" for soft pencils, "HB" for moderate hardness pencils, and "F" for hardness pencils between HB and H. The order of pencils from soft to hard is 9B, 8B, 7B, 6B, 5B, 4B, 3B, 2B, B, HB, F, H, 2H, 3H, 4H, 5H, 6H, 7H, 8H, 9H, 10H and other hardness levels. The larger the number before the H, the harder the lead and lighter the color. The larger the number before B, the softer and darker the lead.