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 ART......
Read MoreWith the global pigment production and technology transfer to China, India and other Asian countries, many local enterprises in China have risen rapidly relying on the advantages of resources and human costs, and have made significant progress in the production scale of classical pigments, making th......
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