Rubber sheets, wind, smoke is used in a variety of different industries according to the purity of the tire. Grading sheet rubber mainly used to identify by sight. And may have different standards. Procedure Stem collected from rubber sheets into the wind, smoke, cleaning and then put into the oven. Upon completion of the wind smoke. The tires will be more transparent. It can be classified into five grades according purity. Flexibility and color of the rubber Rubber sheet processing is done in the form of a bell is a cube made with white flour and written with a bundle with symbols of transport.