The Sirchie Black Rubber Gel Fingerprint Lifters (2" x 4", 12 Pack) is used exclusively by some of the major investigation bureaus in the world. These lifters feature an exceptional adhesive face designed to pick up all powder traces from developed prints, without adhering to the lifting surface. This is true even if the surface is porous (such as paper). These lifters are especially useful for lifting developed prints off highly grained surfaces, as well as irregular and curved surfaces. Simply remove the protective, transparent acetate cover, lift the developed print and replace the cover for protection.