Another eraser type that is popular with artists is the art gum eraser, made of gooey, coarse rubber. It is especially suited to removing large areas, and it does not damage the paper. However, they are not very precise. Gum erasers tend to crumble as they are used, so this type leaves a lot of eraser residue. This "eraser dust" must then be brushed away with care, as the eraser particles can leave marks on the paper. Many artists use a tooth brush to sweep away the loose eraser residue. Art gum erasers are commonly tan or brown.