Adobe illustrator 10 Manuale Utente

Among other options, predefined color management settings specify the default color 
profiles to be associated with the RGB and CMYK color models. Central to the color 
management workflow, these default profiles are known as the RGB and CMYK working 
spaces, respectively. The working spaces specified by predefined settings represent the 
color profiles that will produce the best color fidelity for several common output condi-
tions. For example, the U.S. Prepress Defaults setting uses a CMYK working space that is 
designed to preserve color consistency under standard Specifications for Web Offset 
Publications (SWOP) press conditions.

A working space acts as the default color profile for newly created documents that use the 
associated color model. For example, if Adobe RGB (1998) is the current RGB working 
space, each new RGB document that you create will use colors within the Adobe RGB 
(1998) gamut. Working spaces also define the destination gamut of documents converted 
to the RGB or CMYK color model.

When you specify a predefined color management setting, Illustrator sets up a color 
management workflow that will be used as the standard for all documents and color data 
that you open or import. For a newly created document, the color workflow operates 
relatively seamlessly: the document uses the working space profile associated with its 
color model for creating and editing colors, and the profile is usually embedded in the 
saved document to provide color translation information for the destination output 
device.

However, some existing documents may not use the working space 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 from a document that has not been 

color-managed and lacks a profile altogether. 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 contains a 

color profile different from the current working space. This may be the case when you 
open a document that has been created using different color management settings, or 
a document that has been scanned and assigned with a scanner profile.

In either case, Illustrator must decide how to handle the color data in the document. A 
color management policy looks for the color profile associated with an opened document 
or imported color data, and compares the profile (or lack of profile) with the current 
working space to make default color management decisions. If the profile matches the 
working space, the colors are automatically brought into the color management workflow 
that you have specified, using the working space profile. If the profile is missing or does 
not match the working space, Illustrator displays a message that alerts you to the 
mismatch situation and, in many cases, lets you specify how to handle the colors in 
question.