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jobyts
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How does an eraser (rubber, for non-US) work? Any why it works only for pencil(or graphite) , not for pen?
jobyts said:How does an eraser (rubber, for non-US) work? Any why it works only for pencil(or graphite) , not for pen?
An eraser is typically made of a combination of rubber and other synthetic materials such as vinyl or plastic. The rubber provides the soft, pliable texture while the other materials help to make it more durable and long-lasting.
An eraser works by using friction to lift and collect the graphite particles from the paper. As the eraser rubs against the paper, the surface of the eraser adheres to the graphite particles, pulling them away from the paper's surface and removing the mark.
Erasers can leave marks or smudges if they become too dirty or worn down. When an eraser becomes saturated with graphite particles, it can transfer them back onto the paper, causing smudges. It's important to clean or replace an eraser regularly to avoid this issue.
Electric erasers work by using a small motor to rotate a rubber or vinyl eraser tip at high speeds. This rapid motion creates more friction against the paper, allowing for more precise and efficient erasing.
While erasers themselves are not typically harmful to the environment, their production and disposal can have negative impacts. The synthetic materials used in erasers are often non-biodegradable and can contribute to pollution. It's important to properly dispose of erasers and choose eco-friendly options when possible.