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Icc transfer curves for rip

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  • Icc transfer curves for rip

    I have 4 different Heidlbergpress 50x70cm 8c 70x100cm 8c one XL 8c 70x100cm and a 4c machine
    Using AGFA apogee system for prepress.

    Iam now about to create new icc profiles, will print icc chart on all presses.
    But what is best to do
    I would like to have so few profiles as possible for my clients.
    Is it best to create my own standard by using measuredata from all presses and create your standard or.....

    Use measure data from one press and create icc profile from this and then use transfer curves i prepress system for the other macines.

    I cant have coated and uncoated icc for 4 machines, I never know what press it will run in when it´s ready to print.

    And suggestions ?

    Bigm

  • #2
    Re: Icc transfer curves for rip

    Hi,

    The best and optimal way to do so is as follow:

    make sure press conditions and variable are under control (QC, norms, etc.).

    A) run fingerprint test target on each presses with linear plates, same densities.
    B) read the TVI and OR Gray balance patches (with PerfX Press Curves™ for example) in order to get the correction curves needed to match standard gray balance/TVI. Each press can have different curves.
    C) compare curves from each presses and if they are with the 2 to 3 % the same, you can use the same compensation curves.
    D) Set your curves for CTP and go back on each press to validate the curves AND to print the ICC profiling target
    E) Make ICC profile (with PerfX Pro™ for example) and use the profile for hard proofing, soft proofing and color space conversion if needed.

    That is simple and can be done by anyone. Software have to be used by USER. Let’s go… you can do it!

    hope this help!

    Louis Dery
    TGLC inc.
    www.tglc.com

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    • #3
      Re: Icc transfer curves for rip

      Louis is right, Morgan. 1 profile and several plating curves. Each press will likely have 2 curves - one for coated and one for uncoated.

      It gets more complicated as you expand your screening - so, for example, press A will have a curve for 175 lines per inch on coated stock and another for 20 micron stochastic on the same coated stock.

      rich

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      • #4
        Re: Icc transfer curves for rip

        No stochastic is used.
        We thinking to match our presses to fogra standard, but there is no good profile for uncoated paper, to high ink coverage
        Any using fogra standard in sheet feed enviroment

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        • #5
          Re: Icc transfer curves for rip

          >We thinking to match our presses to fogra standard, but there is no good profile for uncoated paper, to high ink coverage

          How about the ECI's ISOuncoated.icc, or better yet, derive your own from the Fogra29 data set (http://www.color.org/fogra29.xalter)?

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          • #6
            Re: Icc transfer curves for rip

            Hay all I would like to know if any of you guys have set a profile up for just one customer
            Thanks

            Eric

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