The musician draws on the stone with an oily material such as a litho crayon or unique litho paint. The stone then absorbs this oily compound and holds it in place. Now an oil based ink is rolled on to the stone. They are usually walked around the studio with the help of a lift vehicle. A levigator is a rather simple tool consisting of a heavy steel plate with a manage on it. The primary step in reusing a rock is to inspect the flatness of the stone. The artist after that dusts # 80 carborundum grit onto the stone and begins grinding with the levigator. One solitary grain of # 80 grit could spoil the final print.