icc profile from publication

dale11833

• 3. Mai 2012 21:53

My client supplied a cmyk icc profile to use when I deliver the hi-res tiff. Should/can I utilize it in C1 while making my adjustments on the RAW, before output to tiff? If so, how do I add it to C1?

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  dale11833

  • 3. Mai 2012 22:24

  I figured out how to add the profile. When I apply in the Tiff process recipe the image contrast is greatly reduced. Almost looks like it has a film over the image.

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  Nicolas

  • 4. Mai 2012 05:47

  Then the profile could be the culprit, but don't forget that cmyk profiles (all of them!) are a much narrower space than Adobe RGB…
  Just for checking, may i suggest to export from C1 an Adobe RGB file and convert it to cmyk (with this particular cmyk profile) in Photoshop and then see what happens…
  If the same result comes out, you'll have to correct your settings in C1 so the image appears ok for you (using that cmyk profile)…

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  dale11833

  • 4. Mai 2012 06:42

  I processed as adobe rgb and assigned the profile in photoshop. thanks

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  Nicolas

  • 4. Mai 2012 08:01

  Good to hear : )
  I always process 16 bit tifs from C1 so I can assign any profile later in PS…

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  dale11833

  • 4. Mai 2012 15:43

  Does it make a huge difference to process in 16bit? The image size is 2x larger and I need to deliver in 8bit anyways.

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  Nicolas

  • 4. Mai 2012 15:52

  [quote="dale11833" wrote:
  Does it make a huge difference to process in 16bit? The image size is 2x larger and I need to deliver in 8bit anyways.

  
  Yes, you can't see it on a monitor, but to make it simple twice size twice data to work on…
  It happens to work on 16 bit image in Adobe RGB and deliver JPEGs (minimum compression) within sRGB…
  Imho, do the main work with max data and max color space, then when is achieved, reduce size and color space if needed (you may cry a bit about what it does to the blues and the reds, but that's the hard life of the photog!)

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  Paul Steunebrink

  • 4. Mai 2012 17:42

  With CO6 when proofing on-screen with a CMYK profile, the image might look dull and flat compared to selecting a RGB profile. You might also note that when you process the image with the CMYK profile and open it in PS CS5, it might look bright again, similar to a RGB workflow. This difference in on-screen display is due to how CO6 and PS display CMYK images.
  
  Note that I am only discussing how the image is displayed and not the actual C-M-Y-K values in the image.
  
  The difference in displaying the CMYK profiled image in CO6 versus PS (or other editor) comes from how black ink is simulated. Due to the compressed dynamic range of CMYK printers -compared to your monitor – the black is displayed lighter to reduce the dynamic range of the image on your screen.
  
  Photoshop compensates for this by default, but you can change this by customizing the proof setup. CO6 does not provide such options in case you might been looking for it. For fun or educational purposes, in PS CS5 (and probably earlier) go to View, Proof Setup, Custom. In the Customize Proof Condition enable the 'Simulate Black Ink' checkbox.
  
  Apart from how attractive the image might or might not look in a CMYK color space in CO6, when soft proofing you are able to make proper adjustments in levels and contrast to avoid clipping shadows or color cast in highlights. The same is true for processing to a CMYK profile if required. The color readout cursor tool is a great help to achieve this.
  
  Reference reading: http://www.cambridgeincolour.com/tutori ... oofing.htm

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  dale11833

  • 5. Mai 2012 06:05

  Thanks for all that info Paul.

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