Non-toxic chalk: It is the healthiest chalk among the chalks. It is made of pure gypsum and water, solidified and dried, and edible gypsum is used. Most of the teaching abroad use this kind of chalk from elementary school.
1. Non-toxic chalk belongs to high-grade chalk. It is non-toxic in the dust pollution of classroom chalk. After the dust generated by it is inhaled into the human body, the human body can be directly excreted through excretion, and will not remain in the body. Even the water in production has zero pollution to the river.
2. Non-toxic teacher chalk: The chalk used by teachers in teaching is designed for the teaching profession, without pollution and pollution.
3. Non-toxic children's graffiti chalk: according to children's usage habits, chalk that will be fine in the mouth
