Convert to CMYK what RGB profile is used

M
Posted By
mhe
Feb 3, 2007
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299
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4
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Closed
When i convert to CMYK do i need to change my working RGB color space (wich is normally set to Adobe RGB).
Or will photoshop use the enbedded colorspace profile (usually sRGB) in conjunction with the set CMYK profile?

And yes, the file is opened with whatever profile it has enbedded.
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cmyk conversion profile rgb use

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J
Jim
Feb 4, 2007
wrote in message
When i convert to CMYK do i need to change my working RGB color space (wich is normally set to Adobe RGB).
Or will photoshop use the enbedded colorspace profile (usually sRGB) in conjunction with the set CMYK profile?

And yes, the file is opened with whatever profile it has enbedded.
Yes, but when the file is loaded into memory, PS converts it to your working color space. What the embedded color space may be is not longer important.

However, when converting to CMYK, all you need to do is to specify the appropriate profile.

Jim
B
Bernie
Feb 4, 2007
When i convert to CMYK do i need to change my working RGB color space (wich is normally set to Adobe RGB).

No. PS will use the profile embedded in the file, if no profile is embedded, the working space will be used for display and conversion.

Or will photoshop use the enbedded colorspace profile (usually sRGB) in conjunction with the set CMYK profile?

Exactly
M
mhe
Feb 4, 2007
Thanks alot! Another weird thing, if i duplicate and convert the same image to CMYK, they will not be identical. If im pixel peeping, most pixels will have the same values, but not all.

Usually when doing operations on a computer things are extremely consistent. The CMYK conversion must be guestimating so rough that the outcome will vary on the same images.
L
LenHewitt
Feb 5, 2007
if i duplicate and convert the same image to CMYK, they will not be
identical.<<

No, because many RGB colours just cannot be reproduced by process inks, and a CMYK document is limited to those colours/shades that can be reproduced by process inks.

Vivid, saturated RGB colours will be noticeably different, particularly blues and greens.

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Learn how to rescue details, remove flyaways, add volume, and enhance the definition of hair in any photo. We break down every tool and technique in Photoshop to get picture-perfect hair, every time.

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