Choice of profiles for RGB forced to CMYK conversion

When a mixed RGB/CMYK PDF is opened in Illustrator CS6, Illustrator requires a conversion to a color space or another. See this screenshot: http://imgur.com/sK8iEdn

I guess this is a limitation of the Illustrator and there is no way to keep the two color spaces. Under this assumption, is it possible to choose the profiles used for the conversion of RGB to CMYK? Illustrator is possible to use the RGB and CMYK profiles defined in its color settings to do this conversion?

I did some experiments with Illustrator CS6 and target RGB of MacBeth and checked my results with Photoshop CS6. I discovered that (especially) illustrator doing what he should do, within an error of 1% (probably rounded) on the output CMYK values. Here is a summary, in case anyone else needs this info:

Assuming that the elements of the source file are all not marked, when a mixed RGB/CMYK PDF is open in CMYK mode and Illustrator is

chosen, Illustrator uses the profiles and defined in rendering mode

Color settings to make conversions from RGB to CMYK color. Thus, we

have control over the profiles used for this conversion.

If the RGB elements in the PDF file have embedded ICC profiles,

Illustrator uses the ICC profile embedded instead of the RGB profile

defined in the color settings. That happens, however, if the PDF file

also includes the correct intention to output CMYK profile.

If the PDF file does not contain an output CMYK mode, Illustrator will fall

back on the color settings RGB RGB-> CMYK conversion profile. I think that it

would be more correct for Illustrator use the embedded profile of RGB and

the CMYK profile defined in the color settings, but this is not how it seems to work.

If the PDF file contains incorrect output CMYK mode, Illustrator will be

ignore the color settings and follow the embedded profiles, RGB and CMYK

for the conversion, as can be expected.

Tags: Illustrator

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