Wholesale 10*65mm Soft Pastel Washable DIY Chalk for Blackboard

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.

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.