Try the following problems in order starting at the top until you solve the problem.
Make sure you match the paper type loaded in the printer and the paper type set on the printer to the paper type settings in the printer driver.
Use a higher quality setting on the control panel or the printer driver.
Reinstall the ink supply units already installed in the printer.
Reinstalling the ink supply units may clear clogging in the print head nozzles and allow the ink to flow smoothly.
However, because ink is consumed when the ink supply unit is reinstalled, a message asking you to replace the ink supply unit may be displayed depending on the amount of ink remaining.
Use the Print Quality Adjustment feature.
Check that you are using genuine Epson ink supply units.
Try to use genuine Epson ink supply units. This product is designed to adjust colors based on the use of genuine Epson ink supply units. The use of non-genuine ink supply units may cause print quality to decline.
Make sure that there are no paper fragments left inside the printer.
Check the paper.
Check if the paper is curled or loaded with the printable side facing up.
If you cannot solve the problem by checking the solutions above, you may need to request repairs. Contact Epson support.