When you erase the pencil writing with an eraser, the eraser actually absorbs the pencil writing (made of pencil powder) on the paper. As long as you wipe it with an eraser, the pencil writing along the "footprint" of the eraser will disappear. That is, the adsorption force of the eraser to the pencil powder is greater than the adsorption force of the paper to the pencil powder.
The working principle of rubber is to use the force that easily occurs between rubber molecules and other material molecules, and the rubber itself is soft and does not damage the paper. The eraser is made of PVC material, but with the plasticizer ATBC added. Use physical principles to peel handwriting away from the surface of the object on which it is written (excluding correction tape and correction fluid).
Due to the softness and structure of the eraser. In home life, you can use an eraser to remove some stains. For example, to clean computer memory sticks, you can wipe them with a dry and soft eraser. Take an eraser and rub it back and forth on the phone case a few times, so that the dirt on the phone case can be easily removed.
Extended information:
How to use rubber
1. Remove shoe prints from the car skillfully
Many car owners always love car doors Shoe prints on the car are annoying. Although the light interior is nice, there are always shoe prints inadvertently rubbed by yourself or passengers on the door interior and other parts. Some obvious marks are difficult to remove. The eraser has a magical cleaning effect on shoe marks on door panels. With a gentle wipe, even the most stubborn shoe prints will disappear without a trace. It is completely non-corrosive, the price is only 1/100 of the detergent, and it is compact and takes up no space.
2. How to eliminate sparks from switches
If sparks often appear when switches of lights, electrical appliances, etc. are turned on, cut off the power supply, disassemble the switch, and remove the copper sheet inside the switch. There will be soot-like spots. You can use an eraser to rub the soot-black spots on the copper sheet a few times to eliminate the sparks.
Reference: Baidu Encyclopedia-Eraser