Does My Output Change with Age?

Document examiners are often asked to determine whether multiple documents or pages of the same document were produced on the same printer or on different printers. There are several aspects of the document that can be examined in that regard. Documents produced on different laser printers can exhibit differences in the microscopic appearance of the surface of the toner printing, while documents produced on the same laser printer at the same time do not exhibit such differences. This study assesses whether there are any appreciable differences in the microscopic appearance of the surface of the toner printing produced using the same laser facsimile machine over a period of approximately 5 years. No appreciable differences were observed.