A latent image developer system and method is disclosed permitting the recovery of document impressions present in paper and other materials. The disclosed system utilizes two power supplies, a first power supply providing a plate bias charge which is applied to the document to be inspected, and a secondary power supply utilized to attract toner or other imaging powder attractant to the latent images present on the document to be inspected. The disclosed invention permits recovery of previously unrecoverable latent detail within documents as compared to the prior art which utilized a single power supply to promote toner to be attracted to the latent document images.