It was another one of those thoroughly snakebit jobs that go wrong at every step, but at its core is a mystery concerning how QuarkXPress treats an overprinting grayscale image in an exported PDF. “Regular” overprinting objects, such as text or boxes, display and print predictably. But grayscale images are handled differently, and this results in a misleading display in Acrobat, which leads to a surprise on press. And, as you know, “surprise” is not a good word in printing.
Here’s the timeline: Continue reading