Đặc trưng

• It is an all-weather type that does not disappear easily even if it gets wet.
• It is a component of scallop shell, which is more vivid, less powdery and less scattered.
• Dustless chalk is a product whose main ingredient is calcium carbonate, which is also used in toothpaste, and is safe and secure for the body. Compared with gypsum chalk, this chalk has a high specific gravity and hardly dusts.
• Human-friendly, water-resistant outdoor chalk made of calcium carbonate.
• Comes in a chalk case package.
• It can be used more than twice as long as plaster chalk and is economical.
• For writing on a blackboard for rainy weather.