Adobe Acrobat 9 PRO Extended - Manual (Page 436)

430 USING ACROBAT 9 PRO EXTENDED
Color management
Last updated 9/30/2011
sRGB is recommended when you prepare images for the web, because it defines the color space of the standard
monitor used to view images on the web. sRGB is also a good choice when you work with images from consumer-level
digital cameras, because most of these cameras use sRGB as their default color space.
Adobe RGB is recommended when you prepare documents for print, because Adobe RGB’s gamut includes some
printable colors (cyans and blues in particular) that can’t be defined using sRGB. Adobe RGB is also a good choice
when working with images from professional-level digital cameras, because most of these cameras use Adobe RGB as
their default color space.
CMYK Determines the CMYK color space of the application. All CMYK working spaces are device-dependent,
meaning that they are based on actual ink and paper combinations. The CMYK working spaces Adobe supplies are
based on standard commercial print conditions.
Gray (Photoshop) or Grayscale (Acrobat) Determines the grayscale color space of the application.
Spot (Photoshop) Specifies the dot gain to use when displaying spot color channels and duotones.
Note: In Acrobat, you can use the color space in an embedded output intent instead of a document color space for viewing
and printing. For more information on output intents, see Acrobat Help.
Adobe applications ship with a standard set of working space profiles that have been recommended and tested by
Adobe Systems for most color management workflows. By default, only these profiles appear in the working space
menus. To display additional color profiles that you have installed on your system, select Advanced Mode (Illustrator
and InDesign) or More Options (Photoshop). A color profile must be bi-directional (that is, contain specifications for
translating both into and out of color spaces) in order to appear in the working space menus.
Note: In Photoshop, you can create custom working space profiles. However, Adobe recommends that you use a standard
working space profile rather than create a custom profile. For more information, see the Photoshop support
knowledgebase at www.adobe.com/support/products/photoshop.html.
About missing and mismatched color profiles
For a newly created document, the color workflow usually operates seamlessly: Unless specified otherwise, the
document uses the working space profile associated with its color mode for creating and editing colors.
However, some existing documents may not use the working space profile that you have specified, and some existing
documents may not be color-managed. It is common to encounter the following exceptions to your color-managed
workflow:
• You might open a document or import color data (for example, by copying and pasting or dragging and dropping)
from a document that is not tagged with a profile. This is often the case when you open a document created in an
application that either does not support color management or has color management turned off.
• You might open a document or import color data from a document that is tagged with a profile different from the
current working space. This may be the case when you open a document that was created using different color
management settings, or scanned and tagged with a scanner profile.
In either case, the application uses a color management policy to decide how to handle the color data in the document.
If the profile is missing or does not match the working space, the application may display a warning message,
depending on options you set in the Color Settings dialog box. Profile warnings are turned off by default, but you can
turn them on to ensure the appropriate color management of documents on a case-by-case basis. The warning
messages vary between applications, but in general you have the following options:
• (Recommended) Leave the document or imported color data as it is. For example, you can choose to use the
embedded profile (if one exists), leave the document without a color profile (if one doesn’t exist), or preserve the
numbers in pasted color data.