Chosen Solution
Why is my black printing with a drop shadow around fonts and images? I have changed the black ink cartridge.
Try “Aigning the print cartridges” from the built in menu. If that doesn’t work it’s possible the carriage height is somehow messed up. Happened to me when I tried to print on too thick paper. It worked great on the thick paper, but afterword regular paper had that “spraypainted” look to it.