▎ 摘　　要

NOVELTY - A dustless chalk comprises 50-70 pts. wt., preferably 60 pts. wt. calcined gypsum powder, 5-15 pts. wt., preferably 10 pts. wt. talc powder, 1-5 pts. wt., preferably 3 pts. wt. pigment, 0.5-2 pts. wt., 1.2 pts. wt. nano graphene, 1-4 pts. wt., preferably 2 pts. wt. carboxymethyl cellulose, 1-4 pts. wt., preferably 3 pts. wt. polysorbate, and remaining water. USE - Dustless chalk. ADVANTAGE - The dustless chalk enables smooth writing of clear characters, and has required hardness. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of dustless chalk, which involves adding water to calcined gypsum powder and talc powder, and mixing to obtain a slurry, adding water to pigment and mixing to obtain a color paste, adding water to the remaining materials, mixing, adding the slurry, mixing, adding the color paste, mixing, extruding, and drying.