Specifications include, but are not limited to: Color photos and documents: Should be photographed at minimum 600 dpi for archival purposes Color space should be sRGB, at least 24 bit truecolor. 8 bits per channel is preferred. Archival files should be in TIFF format, encoded with no compression or (where available) a lossless compression algorithm. Black and white documents with gray tones, or black and white photos: Should be photographed at a minimum of 600 dpi Color space should be grayscale. RGB is acceptable, but contributes nothing to pure grayscale images and only increases file size. Archival files should be in TIFF format, encoded with no compression or (where available) a lossless compression algorithm.