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The Problem with Photos
There is a truism, somewhat unflattering in its wording: “garbage in, garbage out.” In
commercial printing, whatever you start with in the way of photographic imagery, once you have digitized it (if it starts as a printed photo), opened it in your image editing software, placed the resulting TIFF photo into InDesign, and then handed off the file to the printer for imaging to the press plate, the image has degraded--at least a bit. Printing it on a paper substrate will degrade the image a bit further. Because of this, it is essential that you start with the very best image possible.