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What is CMYK ?
Old 03-14-2007, 06:02 PM   #1 (permalink)
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After getting all the images ready for a catalog. I was told they need to be CMYK. I had them in the RGB mode. Does it make that big of a diference ?

Is there a standard list of image settings for comercial printing someplace ?

Mike
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Re: What is CMYK ?
Old 03-14-2007, 06:21 PM   #2 (permalink)
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Big difference, Mike. RGB Is what you see, CMYK is for printing.

A fast way to recognize the difference is that in RGB (light) white is the grouping of all colors. The same thing, in CMYK (pigments), NO colors. ;-)

Exact opposite in reverse, too. RGB black is NO color, CMYK in black, ALL colors.

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Re: What is CMYK ?
Old 03-14-2007, 06:22 PM   #3 (permalink)
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Quote:
Originally Posted by That_Look_Photo View Post
After getting all the images ready for a catalog. I was told they need to be CMYK. I had them in the RGB mode. Does it make that big of a diference ?

Is there a standard list of image settings for comercial printing someplace ?

Mike
See here for details

http://www.printingforless.com/rgb-cmyk.html

cheers,
rfs
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Re: What is CMYK ?
Old 03-14-2007, 06:23 PM   #4 (permalink)
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Quote:
Originally Posted by R_Fredrick_Smith View Post
See here for details

http://www.printingforless.com/rgb-cmyk.html

cheers,
rfs

Or yeah, you could go read that too LOL
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Re: What is CMYK ?
Old 03-15-2007, 12:04 AM   #5 (permalink)
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CYMK stands for Cyan Yellow Magenta blacK. As if you didn't know that already, but just thought I'd throw that in there. But anyways, I work on printing presses where we use those colors to print with. RGB is used on monitors, which is why it's used most often, but the main difference is the color pallete. RGB images will look slightly different in CYMK color, but it gives an accurate representation (well, almost, but the agency will throw on an icc color profile to meet thier printers standards, but still CYMK color) so that when it hits either the printer, plotter, image setter or whatever the final output device is, it will not have to convert the colors and you will be able to make adjustments to your image prior to the final output so it meets your standards. Personally, I get all of my images off of the cd (I still shoot film) in RGB convert them to CYMK for color correction and then back to RGB. Why? So I can get the blacks really great, as well as the other colors. Plus, just force of habit, I worked in the pre-press dept where that's what we worked with. And since even your home printer prints in CYMK, it helps you get the colors right, but then again, most home printers have an ok RGB to CYMK color converter, but since I'm anal about my color, I just do it like that.

Isaiah
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