Erasers are mainly divided into plastic erasers and rubber erasers.

Plastic rubber has strong plastic texture because it contains polypropylene base. It is characterized by a translucent state when placed under a strong light source. When erasing, the rubber scraps are generally not in strip shape, but in small segments or close to granular shape. Some delicate and lovely erasers with different shapes in the stationery store are actually a kind of plastic eraser. Although they look good, they are not very good to use. It is not recommended to use them, especially for students to answer exams.

Rubber rubber, which is generally used for drawing rubber such as 2B and 4B, belongs to rubber rubber. Compared with plastic rubber, rubber rubber will wipe cleaner. It is characterized by softness and opacity when facing a strong light source. The rubbed rubber scraps are relatively long, which is a little inconvenient to handle.

Having finished the eraser, let's learn about the pencil so that we can better understand the eraser. The classification of pencils is mainly related to the proportion of toner and clay. They are divided into 4H ~ HB ~ 9b from hard to soft. The greater the hardness, the lighter the color, and the smaller the hardness, the darker the color.

At present, Hb, 2b and 4B pencils are mostly used by students, among which 4B pencils have the blackest handwriting. The corresponding 4B eraser can erase the handwriting of 4B pencil very well, not to mention the handwriting of Hb and 2b. Therefore, when buying erasers in the future, we only need to buy a 4B eraser, which can save money and be easy to use~

(WeChat official account of "广东科普科技有限公司"， to bring you more interesting information about stationery.)

(the picture comes from the Internet. If it infringes, please contact to delete it)