Product Description:
The pencil lead is made of graphite as the main raw material. The lead core is mainly composed of clay, pigment, talcum powder, adhesive, grease and wax. It is a pen type for writing and drawing sketches. The hardness of graphite lead core is generally indicated by "H" for hard pencil, B for soft pencil, HB for soft and hard pencil, and F for hardness between HB and H pencil.
