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Dustless chalk was introduced as an alternative to the traditional plaster chalk because of its powder scattering when writing and the possibility of the powder being harmful to the human body. Dustless chalk, made by adding scallop shell powder to calcium carbonate, the main raw material, produces almost no scattering of powder and is harmless to the human body.

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EN71&ASTM D-4236 approved Dustless Chalk eight lovely colors available_ProductProduct