Method/step: 1. Petroleum processing plants transport synthetic rubber in powder or liquid form to rubber manufacturing plants. To use natural rubber, it is strong and big, and workers must first break it and dissolve it. 2. Mix the rubber with ground pumice powder (which can make the rubber slightly hard), iron oxide (which can make the rubber pink), vegetable oil, sulfur and other substances. 3. Heat the mixture to mix sulfur with rubber, so as to increase the strength of rubber and make it more durable.

Eraser, in Britain and Australia, eraser is called eraser; ; But in America, rubber is one of the common names of condoms, and the name of eraser is eraser. This difference is often regarded as a joke by Americans. Now there are many kinds of erasers to meet different needs. In 1770, British scientist joseph priestley said, "I saw a substance that is very suitable for erasing pencil handwriting." At that time, the whole of Europe used rubber particles cut into small cubes to erase handwriting. This substance is called an eraser.