Volume 18, Issue 4 (October 1973)
Identifying the Copying Machine Used in Preparation of Simulated Forgeries
The proliferation of rapid office copiers has in recent years provided a new problem for Document Examiners. Not only is it possible to determine which of many processes was used to prepare a given copy, in many cases an individual machine can be identified as the one on which the copy was made. One of the more common types of office copiers, the xerograph machine, lends itself to these sorts of identification quite well. To establish that a copy was in fact made on a particular copying machine requires full analysis of the copy and the machine.