Low Price Dust Free White and Colored Calcium Carbonate Chalk for Blackboard

In addition to the field of education, chalk also plays an important role in conferences, speeches, and other occasions. In the conference room, chalk became a tool for attendees to record key points and discuss issues; On the podium, chalk helps the speaker draw charts and outline ideas, making the speech more vivid and powerful. The simplicity, clarity, and intuitiveness of chalk make it an effective way of communication in these situations.

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.

Regular chalk is prone to moisture absorption, decreased hardness, and easy breakage when stored for a long time. The blackboards used in schools include cement boards, wooden boards, and ground glass boards. Due to different levels of smoothness on the surface of the blackboards, the softness and hardness of the chalk are also required. The new generation of dust-free chalk can change its softness and hardness at will, and will not slip or break easily when used on various blackboards. It also writes fluently, effortlessly, and has a good hand feel. Dust free chalk is a high-tech product that has been successfully developed in addition to cosmetic materials used in production. Environmentally friendly, non-toxic, dust-free, it is an ideal teaching and office supplies for modern teaching.

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.