LABEL INDICATING AGEING OR DEGRADATION FOR OPTICAL DISC OR OPTICAL DISC ENCLOSURE

摘要

An optical disc enclosure (3) in a library 1 comprises a label (5) for providing a visual indication about the state of degradation or ageing of a corresponding optical disc. The label (5) is placed on a convenient location on the disc enclosure (3) . For example, the label (5) can be placed on the side of a DVD enclosure. When new, the label (5) will be transparent. Upon ageing ordegradation due to exposure to environmental parameters, however, the label (5) will change color, ultimately indicating that data should be backed-up onto another disc. The label (5) can also be placed on the disc itself .