We get a lot of files from "artists" that have more than one of any color, 3 or 4 blacks, assorted blues and reds when there should only be one. These "artists" simply aren't aware of what's needed for print production, and go about it any way that works on their monitors. The first thing we would do in Illustrator is select a single black element, the "select same fill color" from the Select menu. Surprise, surprise, surprise, not all the black elements are selected. Once that's determined, all of them are then made the same black, no transparency at all, 100% pure, no tints. Then, we add in tints as necessary, if necessary. This is done for each color, and the "artist" is informed and billed for it. For this image, we'd have one black for the bold text, one black for what appears to be a 5% to 10% ribbon background, and a white.
Steve