Originally Posted by Symson
Pink Pearl, plastic, art gum, kneaded and erasers are the kinds most often used. You don't want to let your palm touch the paper while you're drawing. Hand oils and sweat harm the paper surface and can make it difficult to erase and to lay down ink. So you certainly don't want to buy an eraser that has oil in it.
Pink Pearl has a pumice - a volcanic ash from Italy - that helps the organic rubber erase and gives it an abrasive quality. The rubber and vulcanized vegetable oil (factice)