Faq About Color Printing - Ricoh P C200W User Manual

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FAQ about color printing

What is RGB color?
RGB color is a method of describing colors by indicating the amount of red, green, or blue used to produce a
certain color. Red, green, and blue light can be added in various amounts to produce a large range of colors
observed in nature. Computer screens, scanners, and digital cameras use this method to display colors.
What is CMYK color?
CMYK color is a method of describing colors by indicating the amount of cyan, magenta, yellow, and black used to
reproduce a particular color. Cyan, magenta, yellow, and black inks or toners can be printed in various amounts to
produce a large range of colors observed in nature. Printing presses, inkjet printers, and color laser printers create
colors in this manner.
How is color specified in a document to be printed?
Software programs are used to specify and modify the document color using RGB or CMYK color combinations.
For more information, see the software program Help topics.
How does the printer know what color to print?
When printing a document, information describing the type and color of each object is sent to the printer and is
passed through color conversion tables. Color is translated into the appropriate amounts of cyan, magenta, yellow,
and black toner used to produce the color you want. The object information determines the application of color
conversion tables. For example, it is possible to apply one type of color conversion table to text while applying a
different color conversion table to photographic images.
What is manual color correction?
When manual color correction is enabled, the printer employs user-selected color conversion tables to process
objects. Manual color correction settings are specific to the type of object being printed (text, graphics, or images).
It is also specific to how the color of the object is specified in the software program (RGB or CMYK combinations).
To apply a different color conversion table manually, see
If the software program does not specify colors with RGB or CMYK combinations, then manual color correction is
not useful. It is also not effective if the software program or the computer operating system controls the adjustment
of colors. In most situations, setting the Color Correction to Auto generates preferred colors for the documents.
How can I match a particular color (such as a corporate logo)?
From the printer Quality menu, nine types of Color Samples sets are available. These sets are also available from
the Color Samples page of the Embedded Web Server. Selecting any sample set generates multiple-page prints
consisting of hundreds of colored boxes. Each box contains a CMYK or RGB combination, depending on the table
selected. The observed color of each box is obtained by passing the CMYK or RGB combination labeled on the
box through the selected color conversion table.
Color conversion tables
US CMYK—Applies color correction to approximate the
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Specifications for Web Offset Publishing (SWOP) color output.
Euro CMYK—Applies color correction to approximate Euroscale
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color output.
Vivid CMYK—Increases the color saturation of the US CMYK color
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correction setting.
• Off
Modifying the colors in printed output.
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