Pencil Safety
Pencil Safety Issues
1. Is pencil lead poisonous? In fact, pencil lead is not poisonous. Lead is toxic, and the main raw materials for making pencil lead are graphite andclay, of course, there is no poison.[3]
Pencilrefills are mainly composed of graphite and clay, graphite isscale-like solid with metallic luster, including carbon-carbon chemical bonds, between layers and layers is van der Waals force, carbon-carbon chemical bonds are very stable, it is very difficult to destroy, which is why diamond and graphite are composed of carbon, but the physical properties and prices vary greatly, nothing in the human body can destroy carbon-carbon chemical bonds, therefore, it is certain that pencil lead is safe (unless the clay added inside is harmful to human health).
2. Does the pencil holder have metal poison?
The appearance of the pencil holder has a wrapping mold or pencil paint technology, on the one hand, it can protect the pen holder, on the other hand, it can increase the appearance, and the trace metal will not have any effect on the body;
2019-02-18 14:33
ꄘPV：0
