Pencil - pencil core toxic! .

Pencil coated plastic in color lead content of up to 12.5%. Scientific research shows that lead is toxic to humans, especially children are more sensitive to lead, although each inhaled into the body not much, but over time can cause chronic poisoning. Light appeared dizziness, headache, memory loss affect mental development. Severe cases can cause child behavior disorders. In addition, the pencil in use has become very clean, with a variety of bacteria and viruses above, containing the mouth susceptible to disease. Biting pencil with a long time, but also cause tooth distortion.

Most people know that pencil lead is not made of lead, it is made of graphite and clay, it is not toxic. But the pencil tip is not clean, the above often with a lot of bacteria. The pencil tip on the mouth is very clean, very unhygienic, if you have the habit of pencil tip, should also get rid of.