Shenzhen Kingsway Industrial Co., Ltd. and Germany to share with non-toxic chalk chalk, chalk is made from plaster. Gypsum composition is calcium sulfate. Stable performance, non-toxic chalk plaster which non-toxic. For thousands of years of teaching non-toxic chalk, traditional Chinese medicine with gypsum (calcium sulfate containing water of crystallization CaSO - 4 · 2H2O) wrap the affected area decoction, topical calcined gypsum (plaster of Paris). Thought to cool fever, thirst, sore myogenic. Shenzhen Kingsway Industrial Co., Ltd. and Germany to introduce radical Fame chalk writing knife ears, one ear knife: binaural first knife strokes --left hook painting can write faster; vertical with left ear pick foot vertical, not seal the ear incision; right ear and one ear with a knife vertical painting hanging vertical pin and seal the ear incision. Ai Nina chalk, chalk graffiti home, chalk dust and Germany preferred Kingsway Industries Limited. Non-toxic chalk dust, and the German Kingsway (certified), Foshan, Shenzhen and non-toxic chalk is provided by the German Kingsway Industries Limited. Shenzhen and Germany Kingsway Industrial Co. (hedehuifu.com) Guangdong Shenzhen, chalk leader, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. And the German leadership at Kingsway staff warmly welcome all inquiries to discuss, create and Germany Kingsway a better future.