Traditional Clay Targets in the world are die-casted with coal tar asphat. Because asphalt contains harmfull materials such as sulphur and chlorine, in the process of manufacturing and using , the hunman body will inhale harmful gas and thus cause certain damage to the health. Futhermore, after this kind of asphalt target being broken up , a large number of asphalt materials are scattered and remained in soil and are difficult to be degraded, and thus it cause serious damage to the soil ...