You might not be aware of this, but chalk dust is not something you want to expose yourself or your children (or future children) to; but with this dustless chalk, that might not be a worry any longer. Created by adding finely crushed scallop shells into the traditional chalk formula, it holds the chalk together much better.
Developed by Nihon Rikagaku, the dustless chalk will keep that toxic cloud out of your lungs. As a beneficial side effect, the new mixture also allows for brighter colors.
Scallop Shell Writing Utensils
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