Erasers are made of sticky substances like plastic, rubber, vinyl and gum. Erasers are used to remove the graphite marks made while writing on paper. They are generally made of sticky substances like plastic, rubber, vinyl, gum, etc.
When a person writes, graphite particles wear off the pencil tip and get interlocked with paper molecules. The soft abrasive action of the eraser causes the graphite particles to stick to it instead of the paper, as graphite has a stronger attraction to the eraser molecules than to paper. The ‘dust’ left over after rubbing consists of worn rubber dumps mixed with graphite particles. Some types of erasers tend to remove the top layer of the paper along with the graphite particles and rubbing the same spot repeatedly can make holes in the paper.
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