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Thread: Calibrations curve

  1. #16
    PRC Member spider is a name known to all spider is a name known to all spider is a name known to all spider is a name known to all spider is a name known to all spider is a name known to all
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    Quote Originally Posted by urbis72 View Post
    Me again :)

    With Fogra we took FOGRA39.txt, and there we read values for CMYK in the LAB, as you say that we need to measure the RGB values, where they can read the RGB values in the LAB?

    do you know how to achieve R,G,B in offset printing???

    take a look at patch #81 for example!

    and study the ISO 12647-2 before squeezing every detail from this forum!

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  3. #17
    PRC Member ColorWizard is a glorious beacon of light ColorWizard is a glorious beacon of light ColorWizard is a glorious beacon of light ColorWizard is a glorious beacon of light ColorWizard is a glorious beacon of light ColorWizard is a glorious beacon of light ColorWizard's Avatar
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    Here are some useful info, regarding not only the press calibration:
    1. http://the-print-guide.blogspot.ca/2011/10/on-press-stability-and-consistency.html
    2. http://printplanet.com/forum/prepress-and-workflow/color-management/246321-how-exactly-dot-gain-tests-are-performed-and-how-results-are-interpreted
    3. http://printplanet.com/forum/prepress-and-workflow/color-management/246331-creating-calibration-curves-and-ink
    4. http://the-print-guide.blogspot.ca/2010/02/principle-of-dot-gain-compensation.html
    Start from #1
    Cheers,
    CW

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  5. #18
    Junior Member urbis72 is on a distinguished road
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    Quote Originally Posted by spider View Post
    do you know how to achieve R,G,B in offset printing???

    take a look at patch #81 for example!

    and study the ISO 12647-2 before squeezing every detail from this forum!

    Ok, sorry Spider.

    I will no longer bother.

  6. #19
    PRC Member ColorWizard is a glorious beacon of light ColorWizard is a glorious beacon of light ColorWizard is a glorious beacon of light ColorWizard is a glorious beacon of light ColorWizard is a glorious beacon of light ColorWizard is a glorious beacon of light ColorWizard's Avatar
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    The citation of Gordon Pritchard
    1. You can't do anything color management-wise unless you already have a stable, reliable, predictable press condition.
    2. Process control from prepress to pressroom is the foundation for any successful change.
    You may learn the techniques of a press calibration/profiling, but it's not worth to do without getting the total control (statistically proven) over the print process.

    Gordon Pitchard has a number of worth reading publications:
    • What the press operator is scrutinizing (http://the-print-guide.blogspot.ca/2011/07/what-press-operator-is-scrutinizing.html)
    • To linearize your CtP plates or not? (http://the-print-guide.blogspot.ca/2010/10/to-linearize-your-ctp-plates-or-not.html)
    • Technical tips for creating brand colors (http://the-print-guide.blogspot.ca/2011/07/technical-tips-for-creating-brand.html)
    • The Color Bar (http://the-print-guide.blogspot.ca/2010/07/color-bar.html)
    • Ghosting (http://the-print-guide.blogspot.ca/2011/02/ghosting.html)
    • Specks in presswork - ink in the non-image area (http://the-print-guide.blogspot.ca/2011/01/specks-in-presswork-ink-in-non-image.html)
    • If car manufacturing was toleranced the same way as printing color (http://the-print-guide.blogspot.ca/2010/11/if-car-manufacturing-was-toleranced.html)
    • Conducting The Press Check (http://the-print-guide.blogspot.ca/2010/03/conducting-press-check.html)
    • Ink Sequence - 4/C process & beyond (http://the-print-guide.blogspot.ca/2009/07/ink-sequence-4c-process-beyond.html)
    • Hybrid AM Screening/XM Screening(http://the-print-guide.blogspot.ca/2009/03/hybrid-am-screeningxm-screening.html)
    and so on...
    Cheers,
    CW

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