 This coil is contained in a disk called an "ategawa" made from layers of very thin paper which is glued together and wrapped in a dampened bamboo leaf, the ends of which are then tied to create a handle.Modern printmakers have adapted this tool, and today barens are made of aluminum with ball bearings to apply the pressure are used; as well as less expensive plastic versions.Although the first prints were simply one-color, with additional colors applied by hand, the development of two registration marks carved into the blocks called "kento" were added.