Custom 4B art erasers for painting
Product Name 4B art erasers Material: rubber Color Yellow Logo Customized Size 32*22*12mm Usage Erasers for kids,students Weight 0.15KG/Set Packing 12PC/Set Eraser Production process 1.Mix rubber with ground pumice powder, iron oxide, vegetable oil, sulfur and other substances. 2.Heating the mixture causes the sulfur to mix with the rubber to increase the strength of…