OKI C8800dtn User Manual

							
C8800 User’s Guide201
Choosing a Color Ma tching Method 
RGB or CMYK?
The RGB color model is based on the three primary colors of 
light; Red, Green and Blue. This  model is used by scanners, 
digital cameras and computer monitors.  
The CMYK color model is based on Cyan, Magenta, Yellow and 
Black printer inks or toners.  
Most documents you print are in RGB format. This is the most 
common method. If you do not know your document’s color 
mode, assume that it is RGB.
CMYK documents are typically only  supported in professional 
Desktop Publishing and Graphics applications.
About the Printer Drivers 
Support for 
RGB data Support for 
CMYK Data
PCL driver (Windows) Yes No
PostScript driver (Windows) Yes Yes
PostScript driver (Mac) Yes Yes
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Choosing a Color  Matching Method
Matching Photographs
RGB only
Select a matching method appropriate to your monitor.
Windows
Natural is generally a good choice. Select a matching 
method appropriate to your monitor.
Macintosh
OS 10.2 and 10.3
Natural is a generally a good choice. Select a matching 
method appropriate to your monitor.
RGB or CMYK
If you are printing photographic images from a graphics 
application such as Adobe Photoshop, you may be able to 
use Soft-Proofing to simulate  the printed image on your 
monitor. 
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Choosing a Color  Matching Method
Matching Specific Colors 
(Example: Company logo)
RGB only
Color Swatch Utility 
Use the Color Swatch Utility to print out a chart of RGB 
swatches. Select your desired RGB values from the 
swatches. Enter the values in your applications color 
picker
See “Color Swatch Utility” on page 325 .  
RGB or CMYK
If you are printing from a graphics application such as 
Adobe Photoshop, you may be able to use Soft-Proofing 
to simulate the printed image on your monitor. 
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Choosing a Color  Matching Method
Printing Vivid Colors
RGB only
Choices are
•Monitor 6500k Vivid
• sRGB
• Digital Camera settings.
See “Color Settings” on page 205 .  
RGB or CMYK
Auto is generally a good choice.
See “Automatic” on page 211.
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Color Settings
This is a list of  all possible options. 
The list you see varies accordin g to your computer platform, 
operating system, color production method, and printer driver 
type.
You can modify these settings  by selecting Advanced Color, 
then Natural.  
Monitor (6500k) Auto               
The default setting (in Macint osh) that selects the best 
options for your printer. This selection works best for 
office situations. 
Optimized for printing general documents when using a 
monitor with a color temperature of 6500K.
Monitor (6500k) Perceptual               
This is best choice for printing photographic images.
Optimized for printing photographs when using a monitor 
with a color temperature of 6500K.
Monitor (6500k) Vivid               
Ideal for office graphics and text.
Optimized for printing bright colors when using a monitor 
with a color temperature of 6500K. Vivid or Digital 
Camera settings produce brightest colors.
Monitor (9300k)            
Optimized for printing photographs when using a monitor 
with a color temperature of 9300K.
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Digital Camera
Optimized for printing photographs taken with a digital 
camera. This tends to produce prints with lighter and 
brighter colors. 
For some photographs, other settings may be better 
depending on the subjects an d the conditions under which 
they were taken. Vivid or Digital Camera settings produce 
brightest colors.
sRGB
This option attempts to simulate RGB color.
Optimized for matching specific colors, such as a company 
logo color. The colors within the printers color gamut are 
printed without any modification. Only colors that fall 
outside the printable colors are modified.
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C8800 User’s Guide207
Hue, Brightness, and Saturation
There are three main components  to color:  Hue, Brightness, 
and Saturation.
Hue
The component that determines the frequency of light or 
the position in the spectrum or the relative amounts of 
red, green and blue. Hue corresponds to the common 
definition of color, e.g. red, orange, violet etc. 
Brightness The component that determines the total amount of light 
(white) in the color. Zero brightness is black. 100% 
Brightness is white.  Intermediate values are light or 
dark colors.
Windows and Macintosh 10.3
Brightness can be adjusted when using the  Gray Scale 
color mode (color matching method).
Gray Scale:  see page 237   
Saturation The degree of saturation of a color is its relative purity, or 
freedom from, mixture with white.
Windows and Macintosh 10.3
Saturation can be adjusted  when using the Gray Scale 
color mode (color matching method).
Gray Scale:  see page 237   
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Color Matching ____________________
How To
NOTE:  Most applications allow the printer properties to be 
accessed from within the document print dialog box.
Application settings ov erride driver settings.
Driver settings override printer menu settings.
 
Color reproduction is a complex topic.
This how-to information explains how to perform color 
matching with your printer.
Color Match Precision 
When the printer performs color matching, it must do many 
calculations to convert between  different color formats (RGB, 
CMYK, etc). These calculations can take time to process.  
The [Color Match Precision]  option allows you to choose 
between higher quality color ma tching (more time consuming) 
or faster but less accurate color matching.
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List of Color Matching Methods
This is a list of  all possible options. 
The list you see varies accordin g to your computer platform, 
operating system, color production method, and printer driver 
type. 
To change these settings in yo ur printer driver, refer to the 
appropriate section.
Automatic
Office Color
Graphic Pro
No Color Matching
Grayscale
Mac ColorSync
Descriptions of Color Matching Methods 
Automatic Your printer automatically uses the best method to match 
color, depending on the ty pe of document you are 
printing.
See page 209   
Office Color   This is a simpler color management system designed for 
ease of use. Office Color is recommended for users who 
are not experts in color bu t want good results when 
printing from programs such as Microsoft Office.
See page 209   
Graphic Pro   This is a powerful color management system based on 
ICC color profiles.
Profiles can be downloaded to the printer hard disk using 
a special utility, and then color matching can be applied 
to all incoming print jobs.
The Graphic Pro color management system is 
recommended for users who are already familiar with ICC 
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profile-based color matching and require more control 
over color.
See page 209   
No Color Matching 
Use this option to turn off all printer color matching.
No color correction occurs when selected. 
Use No Color Matching when  you are using another color 
matching method in your application (such as Color 
Simulation).
See “CMYK ink simu lations – CMYK source data” on 
page 231 .
See page 210   
Grayscale 
This option prints all documents as monochrome. 
No color prints. 
The printer interprets all colo rs as a variation of grays.
See page 210   
Mac ColorSynch This is the color matching system built into the Mac OS
See page 239 .  
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