Attention to the use of pencils
1、Is pencil lead poisonous? Actually, pencil lead is not poisonous. Lead is toxic, and the main raw material for manufacturing pencil lead is graphite and clay, of course, no poison.
The main components of the pencil core is graphite and clay, graphite is a scale-like solid with a metallic luster, in which there is a carbon-carbon chemical bond, layer to layer is van der Waals force, carbon-carbon chemical bond is very stable, want to destroy is very difficult, which is why diamond and graphite are made of carbon, but the difference between the physical properties and price is very large, there is no thing within the body can destroy carbon-carbon chemical bond, so Definitely say that the pencil lead is safe (unless it is added inside the mucus harmful to human health)
2、Is there any metal poison in the pencil lead?
The appearance of the pencil rod has a parcel mould or pencil paint technology, on the one hand, can protect the pencil, on the other hand, to increase the beauty, but the pigment will contain a trace of heavy metals, a small amount of contact will not have an impact, but the bite of the pencil to eat into the mouth is still not good.
Committed to the production of good stationery, so that the world's children are using good quality stationery, so that good stationery to accompany the growth of children!
