Shenzhen and Germany Kingsway Industrial Co., Ltd. to share with chalk, chalk is made from plaster. Gypsum composition is calcium sulfate. Gypsum stable, non-toxic. For thousands of years, Chinese medicine with gypsum (calcium sulfate containing water of crystallization CaSO - 4 · 2H2O) decoction chalk agents, topical calcined gypsum (plaster of Paris) wrap the affected area. Believed to cool and soothing, thirst chalk dust procurement, myogenic sores. More chalk crayons, colored chalk, chalk graffiti, color chalk dust chalk graffiti, please visit our official website or call us for. Shenzhen and Germany Kingsway Industrial Co., Ltd. to introduce the general attitude blackboard chalk, blackboard who are positive on the blackboard, facing away from the students, but with special needs can also be laterally blackboard, side students. Also chalk dust processing, depending on the height of the person writing on the blackboard, blackboard also appropriate when tiptoe or squat to accommodate the needs of the board level. In short, the correct posture should be combined with blackboard practice. Multi chalk crayons, colored chalk, chalk graffiti, graffiti chalk color of choice and Germany Kingsway Industries Limited. Chalk dust wholesale | Shanwei chalk | and de Kingsway (view) are provided by Shenzhen Industrial Co., Ltd. and the German Kingsway. "Chalk dust, graffiti chalk, teaching chalk, Yi Nina chalk, chalk graffiti home" preferred Shenzhen and de Kingsway Industrial Co., Ltd. (2), the company is located at: the 17th six of Longgang District Community Liansheng Road over the years, and the German Kingsway to provide customers the best quality service, Contact: Chen Ping. Welcome to the new and old customers call, letter, visit the guide, business negotiations. And Germany Kingsway expect to be your long-term partner!