Epson 440 - Manual (Page 167)

When you clean the print heads using the Head Cleaning
utility, the output quality does not improve.
Cause What to do
You attempted to clean the
print heads while the ink
cartridges were low or out of
ink. Check the
B or A ink out light. When
the ink cartridges are low or out, the
Head Cleaning utility has no effect.
Replace the ink cartridges as needed.
See page 9-2.
Increasing the Print Speed
Just as printing at a high resolution requires more processing
time, printing in color takes longer than printing in black and
white because the volume of data in a color document is much
greater. For this reason, it is important to be selective in your
use of color if you also require a faster print speed.
Even if your document requires the highest resolution and
extensive use of color, for example when printing a
camera-ready composite that includes color photographs, it
may still be possible to optimize the print speed by adjusting
other printing conditions. Keep in mind that changing some
conditions to increase the print speed may also lower print
quality.
The following table shows the factors that inversely affect print
speed and print quality (increasing one will decrease the other).
Print quality
Print speed Lower
Faster Higher
Slower
Printer driver settings
Print Quality Economy SuperFine-1440 dpi
MicroWeave Off On
High Speed On Off
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05-28-97 DR, pass 0
Troubleshooting 10-27