ARCHIVAL IMAGING AND METHOD THEREFOR

摘要

An archival medium, such as a compact disc, is made of a metal such as aluminum which is mechanically roughened and visibly imageable by selective exposure to infrared laser radiation. A mechanically roughened aluminum medium can also be anodically oxidized under conditions that do not impair the ability of the substrate to be laser imaged. The archival medium can be coated with opaque and transparent polymer coatings before or after imaging for security and/or protection. The coating can be a laser ablatable coating to provide a tamper-proof medium.