Adobe Acrobat 8 3D Manual do Utilizador Página 480

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ADOBE ACROBAT 3D VERSION 8
User Guide
See also
Soft-proof colors (Acrobat)” on page 427
Color conversion and ink management
About color conversion
Colors must often be converted when they are displayed on a monitor or sent to a printer. Conversion is necessary
when the color models do not match (for example, when CMYK color is displayed on an RGB monitor, or when a
document with images in an RGB color space is sent to a printer).
Acrobat uses the source color spaces of objects in a PDF to determine what (if any) color conversion is required, for
example, from RGB to CMYK. If a PDF contains objects with embedded color profiles, Acrobat manages the colors
using the embedded profiles rather than the default color spaces. For images and other objects in the PDF that
contain embedded color profiles, Acrobat uses the information in the profile to determine how to handle the
appearance of the color. For objects with managed colors (those with embedded color profiles), this conversion is
wellunderstood.Unmanagedcolors,however,donotuseprofiles,soonemustbetemporarilyusedforthe purpose
of conversion. The Color Management panel of the Preferences dialog box provides profiles for converting
unmanaged colors. You can also select specific profiles based on local press conditions.
See also
“Why colors sometimes don’t match” on page 417
“Working with color profiles” on page 429
Convert Colors dialog box overview
If your PDF will be output to a high-end device or incorporated in a prepress workflow, you can convert color objects
in the document to CMYK or another color space. Unlike other Acrobat features that temporarily convert colors
during printing or viewing, but leave the document colors unchanged, the Convert Colors feature actually changes
the color values in the document. In the Convert Colors dialog box, you can convert the colors of a single page or an
entire document.
Note: The Convert Colors dialog box converts all colors in the document to the destination color space. To convert only
the colors of selected objects, use the TouchUp Object tool.
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