In this department I learn how to use each tools for testing hardness, dispersion, cure condition, modulus, tensile strength, elongation, specific gravity, ozone resistance and oil resistance of each rubber compound, the technic to solve the problem when rubber compound cannot use in production line, and learn the process of mixing each rubber compound. My responsibility is test all specification above of rubber compound and test the new chemicals to compare with chemicals in use. Then I was assigned to create the new rubber compound.