Bedienungsanleitung Lexmark CS728 (Seite 103 von 129) (Englisch)

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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 dierent 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 dierent color conversion table manually, see

“Modifying the colors

in printed output” on page 102.

If the software program does not specify colors with RGB or CMYK combinations, then manual color correction

is not useful. It is also not eective 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.

By examining Color Samples sets, you can identify the box with color closest to the color being matched.

The color combination labeled on the box can then be used for modifying the color of the object in a software

program. For more information, see the software program Help topics. Manual color correction may be

necessary to use the selected color conversion table for the particular object.

Selecting which Color Samples set to use for a particular color‑matching problem depends on:

• The Color Correction setting being used (Auto, O, or Manual)

• The type of object being printed (text, graphics, or images)

• How the color of the object is

speciﬁed

in the software program (RGB or CMYK combinations)

If the software program does not specify colors with RGB or CMYK combinations, then the Color Samples

pages are not useful. Additionally, some software programs adjust the RGB or CMYK combinations

speciﬁed

in the program through color management. In these situations, the printed color may not be an exact match

of the Color Samples pages.

Troubleshooting 103

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Lexmark CS728 Seite 103

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