A kind of current pencil pencil can be divided into 2 types is the pencil (Lead Pencil) is commonly used to identify pencil The pencil lead is made from carbon graphite mixed with clay (Clay) use the letters B (Black) and H (Hard).The hardness and the intensity of the pencil Size 6 B have Clay mix, the size 6 H is mixed Clay most pencils with low intensity are used in การร่างภาพ. The pencil with intensity is used in the shading pencil carbon (Carbon Pencil) or charcoal made from the mixture of charcoal (Charcoal). Lead like charcoal, the hard and soft sequence from HH (very hard), HB (medium), B (gut), but black BB (black), BBB (black), some companies use the letters. E instead of letters, B
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