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Gary wrote: " If you scan unexposed film, it has to be scanned with light that the film is not sensitive to." Gary, that was my first thought, too. Short time after posting my first reply, I realized that there are scanning devices that do not use a light or radiation at all. The scanning probe microscope devices are a good example. The probe in this case is not light or an ion or electron beam, but usually simply a very finely-pointed needle, with a needle sharpened to atomic dimensions. Such a scanner uses a sophisticated (laser) system to detect its deflection as it is scanned across the surface of the specimen. If the original post was about such a scanner in a research environment, I would guess any similar practical device for use in a photo lab is many decades away. However, I really think this discussion should be moved to another place, perhaps the Scanner list. Regards, Lubos - Please do not include an entire message in your response. Delete the excess. http://www.leben.com/lists for list instructions.