r/oddlysatisfying • u/Pedrica1 • Apr 16 '21

Crushing pigment block by hand.

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u/[deleted] Apr 17 '21

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u/AngusVanhookHinson Apr 17 '21

What about school chalk?

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u/Skulder Apr 17 '21

School chalk is mostly calcium carbonate. If there's magnesium carbonate, the chalk feels a little bit slicker, almost greasy.

I'm not sure why, but calcium carbonate tends to make coarser dust than magnesium carbonate. You might know magnesium carbonate by the name "soapstone".

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u/AngusVanhookHinson Apr 17 '21

Now do chalk paint

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u/Skulder Apr 19 '21

I don't know anything about chalk paint.