Non toxic chalk is made by solidifying and drying pure gypsum with water, using edible gypsum. Most teaching abroad has been using this type of chalk since elementary school. Non toxic chalk belongs to advanced chalk, and it is non-toxic in the dust pollution of classroom chalk. The dust generated by it can be directly excreted by the human body through excretion without remaining in the body. Even the water in production causes zero pollution to the river.

Chalk is a widely used stationery in daily life, usually used for writing on a blackboard. In ancient times, chalk was usually made from natural chalk, but nowadays it is often replaced with other substances. The main component of chalk is calcium sulfate, a white precipitate that is not easily decomposed and has larger particles than dust.