My chalk idea

[grayson]

I heard of Hagoromo chalk, and how good it is. I wanted to make something like that. My idea was charcoal and chalk mixed together to create a smoot, doesn't get on your hands, material. The marketing campaign is for another time. But what else can I put in there? the idea is to make a batch for 10 bucks (I can get charcoal at home, and seashells are cheep, and contain calcium carbonate in them)