
Sidewalk chalk is usually made of colored calcium sulfate but you can also make it at home.
Ingredients:
1 cup Plaster of Paris
1/2 cup of water
powdered tempera paint
Something to use as a mold
Directions:
Mix the water, Plaster of Paris and powdered tempera paint. The more tempera paint you add, the deeper the color of the chalk will be. Then pour the mixture into your mold. Let dry for about 24 hours.
http://www.thriftyfun.com/
For some more chalk masterpieces, look up Julian Beever and Kurt Wenner.
x
AB
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