Chalk also carries a cultural and emotional inheritance. It has witnessed the hard work of countless teachers and accompanied the growth of generation after generation of students. Every stroke of chalk on the blackboard is like a sowing of knowledge and a watering of wisdom. The writing process of chalk is not only a display of skills, but also a manifestation of emotions and cultural inheritance.

Chalk has become a powerful assistant in the field of education due to its unique material and texture. It is made of limestone and after fine processing, it presents a smooth and hard surface. This material allows chalk to maintain stable friction and clarity during writing, with smooth and less blurry handwriting. At the same time, the writing effect of chalk also has a certain degree of durability, and can remain relatively clear even in damp or friction environments.

Chalk, an ancient writing tool, has witnessed the transmission of countless knowledge and sparks of wisdom with the development of human civilization. It has become an indispensable presence in education, conferences, and public speeches due to its unique materials and writing style. Today, let's enter the world of chalk together and feel its charm and heritage.

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.

Dust free chalk is an improved product of ordinary chalk, aimed at eliminating classroom chalk dust pollution. It only adds oil or polyol substances as binders to ordinary chalk, and then adds fillers with higher density, such as clay, mudstone, cement, etc. This can increase the density and volume of chalk dust, making it difficult to fly away. However, in practical applications, its effect on reducing chalk dust pollution is not very obvious.