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  • Permanently deleted user
    I've prepped thousands of images for offset press over the years, but I would never use Capture One for that, only Photoshop. Well, in the early days, we used Linocolor, but that's long gone and has been surpassed anyhow.

    Are you talking about specific CMYK numbers in terms of highlight and shadow values? I can't tell from how your question is posed, but your output profile is going to get you close for starters, then you use Curves and Selective Color to fine tune with the highlights being much more critical than the blacks. Direct to plate presses can hold less than a one percent dot these days if you're on a good press with good paper, so a 1,1,1,0 will definitely show tone but not much detail. Again, depending not the press and paper, usable detail may need to go to 4,2,2 or 3,1,1 or 2,1,1 where the traditional numbers were more like 5,3,3 (Cyan, Magenta, Yellow) You need to talk to the press people to find out both the recommended profile and the suggested total ink for the blacks, and often, you need to actually rebuild profiles using Profiler or Profilemaker to get a specific black generation and total ink. The ranges for blacks are much greater than for the light end and really depend on the paper and press. Good press and high quality coated stock can handle anywhere from 325-350 percent total ink and the black percentage could be anywhere from 85 to 95 percent. Uncoated stock might be down around 270 percent with a max black below 90. Publications are mostly under 300 percent total ink but some a a bit higher or lower depending on the overall quality.

    Prepping files for print is a lot easier than it used to be, with many more places being on board with good profiles, but you still need to be able to interpret and anticipate in order to get the best quality - things like using Selective Color to pull Magenta out of the blues, even a little farther than you think as blues almost always tend to go Magenta on press.

    My workflow to to process the raw in C1 to 16 bit RGB. Further color correct and retouch in Ps, then make a flattened copy that is converted to CMYK in Ps, then sized and sharpened for output in Ps, which is then placed in the InDesign document and output as a press ready CMYK pdf that is sent to the printer.
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  • Tim Kerr
    Thankful for your informative response. There is much for me to learn in so many things.....
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