How are crayons made?

Crayons can be made by casting and extrusion. , the general ratio is 40% C16 ~ C18 fatty acids, 40% wax, 5% various pigments and 15% various fillers. If the extrusion method can be added filler. The TYPE OF WAX DEPENDS ON THE SURFACE OF WRITING OBJECTS SUCH AS GLASS, metal, wood, FABRIC OR OTHER ARTISTIC REQUIREMENTS. In the manufacturing material added to make the pigment can be dispersed after water, can make the line can be water infiltration and diffusion. This writing material is a new variety of crayons.