Why is my black printing with a drop shadow?

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.

I've had endless shadow troubles with my Canon TS6051 and it seems a common problem in America but no-one seems to be able to solve it. Lots of hopeful ideas but none seem to work.