What is rubber earaser?

A rubber eraser is a type of writing tool that is used to remove pencil marks from paper or other surfaces. It is typically made from synthetic rubber and comes in various shapes and sizes.

The primary function of a rubber eraser is to remove graphite or carbon marks from paper by friction. When rubbed against the surface of the paper, the rubber material of the eraser creates heat, which, combined with the mechanical friction of the eraser particles, works to break down and lift the graphite particles from the paper. The eraser particles and the graphite particles are then lifted off the paper by the eraser and rolled into small balls that can be easily brushed away.

Rubber erasers come in different forms such as block, pencil, and pen shape. Block erasers are usually larger and require the use of both hands to erase, while pencil erasers are small, easier to handle, and fit on the end of a pencil. Pen erasers are even smaller and are designed for precise erasing of small areas.

Rubber erasers also vary in hardness or softness. Some erasers are hard and abrasive, while others are softer and gentler, depending on the type of paper or surface they are intended to erase. There are also special erasers designed for specific uses, such as kneaded erasers that are perfect for lifting charcoal or pastel marks, and electric erasers for precise and rapid erasing.

Overall, rubber erasers are a common and essential tool that is widely used for correcting and editing written work in offices, schools, and homes.