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Originally Posted by Hog
Thought it was something called French chalk?
Either way I'm no dancer so I wouldn't know lol.
But yes you can see something on the tyres when it's slippery.
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It's not regular chalk, that's calcium carbonate -
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French Chalk
A natural compact talc made from a soft magnesium silicate mineral (MgH 2 (SiO 3)4) also known as Steatite or Soapstone.
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It's a dry lubricant, so only way to get that off is wipe it off, maybe with a moist mop.