Eraser is stationery made of rubber, which can erase traces of graphite or ink. There are many kinds of erasers, with different shapes and colors, including ordinary erasers, special erasers for art, such as 2B, 4B and 6B for painting, and plastic erasers.

Origin of rubber

People have been using erasers for more than 200 years now. Eraser can erase pencil words, which was first discovered by British scientist Priestley in 1770. Before that, people used bread crumbs to erase pencil words.

eraser

Priestley's discovery caused a great sensation because it brought great convenience to people. However, the earliest erasers were made of natural rubber. When you erase the words, there is no crumb. It just sticks the pencil tip to the eraser, and the more it is rubbed, the dirtier it gets.

Later, people added sulfur, oil and other substances when making rubber, which made the rubber easy to fall off. Erased pencil powder leaves crumbs for the eraser, so that the eraser can always be clean and the paper will not be dirty.

Composition of rubber

The raw materials of rubber are rubber or plastic, sulfur, vegetable oil and gravel. Since the birth of 1770, erasers have been loved by everyone for their numerous choices and indispensable stationery roles. A small rubber ball was brought by Columbus who crossed the Atlantic Ocean. It became an eraser and traveled across the seven oceans to the whole world.

An eraser can erase pencil marks and correct typos. Now, some erasers can erase pen marks. Some erasers are beautifully made and can be used as handicrafts or gifts. They can also erase the underworld road on shoes, cars and other things.