Biting a pencil will lead to lead poisoning? The truth of the rumors look here

Pencils are one of the daily essential learning tools, especially elementary school students, who need to use pencils every day. Many students have a bad habit of reading and thinking, and will bite pencils when they practice doing problems.

This led to the rumor that the incident of excessive blood lead in children is largely related to "pencil biting". This problem often troubles some people. So what is the truth?
The pencil was born without lead
Many people think that lead poisoning is caused by lead in pencils, but this is not the case. When the pencil was first invented, it was from the time of Napoleon. An officer used graphite to mix clay and burned it in a kiln to make a pencil lead.

Manufacturers mix different amounts of clay into graphite, and the hardness of the pencil cores produced is also different, resulting in HB. Therefore, the pencil production process does not use lead as a metal.
Change the pencil if you bite it, the paint is harmful
Then everyone asks that there is no harm in biting a pencil. The answer is: No! For some pencils that are not manufactured by manufacturers with low technical requirements, the wooden rods of the pencils are coated with colored pigments. If the pigments contain traces of heavy metals or other harmful substances, if they are swallowed in the stomach, they will also have an impact on the body.
Rumor-stopper identification: there is no lead in the pencil lead, which will not let you lead poisoning. But also get rid of the bad habit of biting pencils.