Sorry if I'm high-jacking, but are you scanning in TIFF or JPG? If you are scanning in JPG, scanning in TIFF might help.
A tif file is a lossless which retains all the file information everytime you open and close the file. The files are larger with tif.
A JPG file is a lossy format which removes information from the file everytime it is saved and resaved. It is a smaller file format than tif.
A PNG is a lossless format which retains the quality and compresses the file. If you want tp use this for production you should check with your printer as some RIPs can have problems rasterizing this format.