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Soft Proof settings in PS CS3 & CMYK vs. RGB
What settings should we use to soft proof in PS CS3? Here's the Help info in Photoshop - what settings will give us the most accurate color view onscreen?
Custom soft-proof options
Device To Simulate Specifies the color profile of the device for which you want to create the proof. The usefulness of the chosen profile depends on how accurately it describes the device’s behavior. Often, custom profiles for specific paper and printer combinations create the most accurate soft proof.
Preserve CMYK Numbers or Preserve RGB Numbers Simulates how the colors will appear without being converted to the color space of the output device. This option is most useful when you are following a safe CMYK workflow.
Rendering Intent (Photoshop and Illustrator) When the Preserve Numbers option is deselected, specifies a rendering intent for converting colors to the device you are trying to simulate.
Use Black Point Compensation (Photoshop) Ensures that the shadow detail in the image is preserved by simulating the full dynamic range of the output device. Select this option if you plan to use black point compensation when printing (which is recommended in most situations).
Simulate Paper Color Simulates the dingy white of real paper, according to the proof profile. Not all profiles support this option.
Simulate Black Ink Simulates the dark gray you really get instead of a solid black on many printers, according to the proof profile. Not all profiles support this option.
ALSO: Can RGB JPGs be sent or only CMYK images?
Custom soft-proof options
Device To Simulate Specifies the color profile of the device for which you want to create the proof. The usefulness of the chosen profile depends on how accurately it describes the device’s behavior. Often, custom profiles for specific paper and printer combinations create the most accurate soft proof.
Preserve CMYK Numbers or Preserve RGB Numbers Simulates how the colors will appear without being converted to the color space of the output device. This option is most useful when you are following a safe CMYK workflow.
Rendering Intent (Photoshop and Illustrator) When the Preserve Numbers option is deselected, specifies a rendering intent for converting colors to the device you are trying to simulate.
Use Black Point Compensation (Photoshop) Ensures that the shadow detail in the image is preserved by simulating the full dynamic range of the output device. Select this option if you plan to use black point compensation when printing (which is recommended in most situations).
Simulate Paper Color Simulates the dingy white of real paper, according to the proof profile. Not all profiles support this option.
Simulate Black Ink Simulates the dark gray you really get instead of a solid black on many printers, according to the proof profile. Not all profiles support this option.
ALSO: Can RGB JPGs be sent or only CMYK images?
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Inappropriate?The inks of the HP Indigo digital press are fairly close to standard SWOP inks, so you can use the "U.S. Web Coated (SWOP) v2" icc profile in PS to do a soft proof of your images. I would not select simulate paper colors or simulate black ink, because the paper used in the Indigo is whiter and the blacks are blacker than the SWOP paper/inks. JPGs can definitely be sent as RGB. In fact, I recommend sending all images as RGB and letting the the MagCloud system do the appropriate color conversion to Indigo CMYK.
Hope this helps!
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