Danstart17 wrote:
I've decided to print page 1 of the book, see below values:
Yellow - C = 0%, M = 0%, Y= 100%, K= 0%
Magenta - C = 0%, M = 100%, Y= 0%, K= 0%
Cyan - C = 100%, M = 0%, Y= 0%, K= 0%
Black - C = 0%, M = 0%, Y= 0%, K= 100%
I've created a new file in Illustrator using the ProPhoto RGB color space and created some blocks with the above values, when exporting to PDF, I export using the following settings:
Color conversion: Convert to destination
Destination: Document RGB - ProPhoto RGB
Profile Inclusion Policy: Include destination profiles
I believe my rip will then use my profile to print it
Does this even sound right or am the problem?
now printed the colors using my new profile and the colors do appear different
-- I'm surprised no one asked what CMYK is your working space. As each different CMYK profile represents a different printing condition (printer or press, inks, paper, calibration, etc.), which one you select is critical. For example, it can be futile to create a design or edit images in a huge RGB color space like ProPhoto if you are then converting to say, U.S. Web Coated (SWOP)v2 for CMYK output - huge ranges of those RGB colors can't be produced in that CMYK space, so they are converted (i.e., crunched) down to the vastly smaller color gamut of "SWOP".
For that matter, even though your RIP may well be able to simulate most of the Pantone colors well, if your print file has already been converted to "SWOP", lots of those colors have been discarded (converted to ones inside the color gamut of "SWOP"), and the RIP cannot magically restore them. If you are running the RIP yourself, the ideal CMYK space to target is that of the RIP itself (including the media), but it is simpler to just send tagged RGB files & have the RIP use those RGB source profile(s) to convert to it's CMYK for output.
A couple notes from the real world of print & web production - take these as gentle suggestions, pls:
1. what profile to use for original design? - since you spec logos for web, vehicles & stationery, start with sRGB. You'll want sRGB for web and for sending files to grand format inkjet & solvent printers (vehicle wraps). For LH or any offset print you'll deliver CMYK - for better color, avoid the infamous US Web Coated (SWOP)v2 profile, check out the idealliance.org site for guidance & profiles. And if possible spec PMS/Pantone spot colors in your CMYK files (not in RGB) to avoid conversions - of course this is moot if you're printing only 4 inks, where the spot color is only being simulated anyway.
* oops, just saw your addtiional note about your printer spec'ing Fogra39 - fine, if that's what they request, just use it. *
2. using stock photos - (good luck! ;-) - usually they are RGB, sometimes tagged with ICC profile, often not. Sometimes they are tagged with incorrect ICC profile (!). In general, if photo has profile attached, use it. If no profile, assume sRGB color (and use Photoshop to Assign that profile to it).
Hope this helps,
John