how to crush chalk into powerd

Jun 20 2018 Once the magnesite is purified of the iron and carbonate crystals it is in a solid block The block can then be used in the block form or it can be crushed up into finely crushed powder Because MgCO3 is insoluble in water and sweat is manly water MgCO3 will keep hands from getting sweaty How Not to Use Chalk