what is erased based on
An eraser, (also called a rubber in Canada, the UK, Ireland, India, Australia, New Zealand, and South Africa, from the material first used) is an article of stationery that is used for removing writing from paper. Erasers have a rubbery consistency and come in a variety of shapes, sizes and colours. Some pencils have an eraser on one end. Less expensive erasers are made from synthetic rubber, but more expensive or specialized erasers are vinyl, plastic, or gum-like materials.