Abstract: A device is disclosed for removing the information bearing surface and the data carried thereby from the substrate layer of a compact disc. The device includes a housing which has a first portion having an inner surface defining a first chamber. A second housing portion is selectively securable to the first housing portion to enclose the first chamber. A mechanism is provided for selectively mounting a compact disc within the first chamber. An apparatus is disposed within the chamber for removing the information bearing surface from the substrate layer of a compact disc positioned on the mounting mechanism by physically converting the information bearing surface to particulate material. The removal apparatus is biased against the information-bearing surface of a compact disc positioned on the mounting mechanism as the information-bearing surface is reduced to particulate material. Finally, a mechanism is provided for selectively actuating the physical removal apparatus within the first chamber.

Abstract: An acidic solution for use as a cleaning composition for copper and copper alloys includes a solution of from about 1-20 weight percent hydrochloric acid and approximately 80-99 weight percent of an aqueous hydrochloric acid-based composition which has a pH of less than about 1.0 yet is substantially non-reactive with compounds having low oxidative states, including human skin tissue.