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.
To check the actual ink remaining, visually check the ink level in the printer's tank. Refill the ink tank if the ink level is below the lower line.
Align the print head.
Run a nozzle check to see if the print head nozzles are clogged.
If there are missing segments in the nozzle check pattern, the nozzles may be clogged. Repeat head cleaning and the nozzle check alternately 3 times or runnning Power Cleaning once, and check if the clogging has cleared.
Note that print head cleaning uses some ink.
Turn off the printer, wait for at least 12 hours, and then check if the clogging has cleared.
If the problem is clogging, leaving the printer for a while without printing may solve the problem.
You can check the following items while the printer is off.
Check that you are using genuine Epson ink bottles.
Try to use genuine Epson ink bottles. The use of non-genuine ink bottles may cause print quality to decline.
Make sure that there are no paper fragments left inside the printer.
When you remove the paper, do not touch the translucent film with your hand or the paper.
Check the paper.
Check if the paper is curled or loaded with the printable side facing up.
If you turn off the printer, wait for at least 12 hours, and if print quality has still not improved, run Power Ink Flushing.
During bidirectional printing, the print head prints while moving in both directions, and vertical lines may be misaligned. If print quality does not improve, disable the bidirectional setting. Disabling this setting may slow down printing speed.
Windows
Clear Bidirectional Printing on the printer driver’s More Options tab.
Mac OS
Select System Preferences from the Apple menu > Printers & Scanners (or Print & Scan, Print & Fax), and then select the printer. Click Options & Supplies > Options (or Driver). Select Off as the Bidirectional Printing setting.
If you cannot solve the problem by checking the solutions above, you may need to request repairs. Contact Epson support.