Epson Stylus Pro 7890 User Manual page 105

Epson Stylus Pro 9890/9908/7890/7908
Cause
Print quality is poor, uneven,
too light, or too dark.
The color is not the same as
another printer.
User's Guide
Problem Solver
What to do
Have you compared the printing result with the image on the display
monitor?
Since monitors and printers produce colors differently, printed colors will not
always match on-screen colors perfectly.
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Televisions and monitors produce a range of colors by combining the 3
colors known as the 3 primary colors of light, red (R), green (G), and blue
(B). When none of the lights are shining, the result is black, and when all
3 colors are shining, the result is white.
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However, color gravure printing and color printers use a combination of
the 3 primary colors of pigment, yellow (Y), magenta (M), and cyan (C).
When no color is applied, the result is white, and when all 3 colors are
mixed evenly, the result is black.
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Printing a scanned image necessitates the changes from the original
image (CMY) to the monitor (RGB) then to the print (CMY), making color
matching even more difficult. In this case, color matching between the
devices is handled by ICM (Windows) or ColorSync (Mac OS X).
When using a color management system such as ICM (Windows) or
ColorSync (Mac OS X), have you set a monitor profile?
For proper management, the input devices and applications used must
support ICM (Windows) or ColorSync (Mac OS X). Also, it is necessary to set
the profile for the monitor that you are using.
Did you open the front cover during printing?
If the front cover is opened during printing, the carriage stops suddenly
causing unevenness in the color. Do not open the front cover during
printing.
Does INK LOW appear on the LCD panel?
The print quality may decrease when the ink is nearly expended. Replace
the ink cartridge with a new one. If the print quality is not good after
replacing the ink cartridge, perform head cleaning a few times.
Colors vary depending on the printer type due to each printer's
characteristics.
Since each printer differs according to the model, such as the ink, printer
driver, and printer profile, hence each printer's results slightly differ as well.
You can achieve similar colors with the same color adjustment method
(sRGB or Adobe RGB) or gamma setting by using the printer driver.
See "Color Management Printing" on page 155
To match the color precisely, use the color measurement device to perform
color management.
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