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tiff rgb to cmyk conversion

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YrbkMgr

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Jul 18, 2003, 2:32:33 PM7/18/03
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Michael,

ACDSee (and many other image viewers) are not color managed. When color management is enabled in photoshop, an image is embedded with a profile that defines the exact colors to be used, so that if someone else opens the file with a color managed application, that profile will be read and the data will be "translated" to the appropriate representation on the other machine.

Since ACDSee is not color managed, it ignores the profile.

Moral of the story? I never use non-color managed apps to evaluate an image that I've created in Photoshop. I use ACDSee just to identify the image, kind of thing.

Peace,
Tony

Michael Appelmans

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Jul 18, 2003, 2:28:37 PM7/18/03
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I converted an RGB Tiff image delivered to me to CMYK to send to printer. The image colors look the same in Photoshop 7 but if I open the new CMYK image in any other image program (ACDSee) the color is different (on my monitor). Everything seems to take on a greenish tint. Is this normal and can I expect the CMYK image to print with the colors I see in the RGB image on my monitor?

Is there some other way I should be doing RGB to CMYK conversion to guarantee the same colors get printed?

Thanks for any advice.

Michael Appelmans

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Jul 18, 2003, 6:41:54 PM7/18/03
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Thanks for your reply Tony. Should I assume the printer with 4 color press will use the managed color info in the tiff image or am I taking a big chance here. The reason I'm nervous about this is my client's work is being featured on the cover of a trade magazine and he would be really unhappy if it didn't look at least reasonably similar to the original image.

YrbkMgr

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Jul 18, 2003, 7:34:19 PM7/18/03
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Michael,

It depends on who you are: some people enjoy Las Vegas - I don't <grin>.

In truth, my rule of thumb is assume NOTHING. Talk to the print service. Find out what they need and prepare your image accordingly. The only real answer is to converse with them. I always have a long (and usually painful) conversation with the print service. Sometimes we use Pantone spot colors, other times not. That's about the limit of my experience, but I would leave you with this: never send a file to the printer unless you've had a lengthy conversation. But that's me.

Peace,
Tony

LenHewitt

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Jul 19, 2003, 6:14:08 AM7/19/03
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Michael,

Listen to Tony! Talk to the printer,

Chances are a trade mag will be web offset printed and provided you have
your CMYK working space set to SWOP Coated, the printed image should be a
reasonable match to your screen image in Photoshop (assuming you have a good
monitor profile). However, depending upon the quality of the paper used,
some adjustment may be needed for dot-gain. However, you can't possibly know
this unless you talk to the print house!


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