When the print results on glossy paper are uneven, such as faint bands in dark areas at the bottom edge, enable Bottom Edge Print Quality Priority. Since priority is given to improving the unevenness, the printing speed will be slower.
Windows
Select Quality Options as the Level setting on the printer driver's Main tab, and then select Bottom Edge Print Quality Priority.
Mac OS
Select Print Settings from the print dialog's pop-up menu, and then select Quality Options as the Print Quality setting. Select Bottom Edge Print Quality Priority.