2. Place the rubber and milled pumice powder (which can make some rubber becomes slightly stiff), iron (you can make into a pink rubber), vegetable oil, sulfur and other substances mixed.
3. The mixture was heated, so that rubber is mixed with sulfur, in order to increase the strength of the rubber and make it more durable.
4. Place a soft, still warm material fed press (pressed into a die), do grow thin rubber stick. Rubber stick a knife cut into small pieces, let it cool, and then transported to a pencil eraser on the pencil factory made.
5. The bulk eraser used alone, the rubber mixture is injected into the heated mold in various shapes made. Wait until the cooling, the mold is opened, various shapes of the eraser came out
