chalk is a very pure form of limestone made of calcite. i think >:P
No, it's not. Pastel chalk or soft pastel is easier to blend and draw with because it is softer, hence the name, soft pastel. Soft pastels are made of ground pigments, gum tragacanth, and a filler....
Downlands is the pub in Worthing, Wiltshire
By evaporation.
yes but you have to soak the chalk more than the pastels