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Thread: Nchannel in InDesign

  1. #1
    madsk is offline Junior Member
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    Question Nchannel in InDesign

    I was hoping someone could help me out with an InDesign problem.

    We have some customers who deliver pdf's with NCHANNEL (Or Device-N etc.) colors (Typically its black or white that has been defined). The problem is that our rip for our "smaller" large format printers (Roland Versaworks rip) does not handle NCHANNEL well and usually ends up just ignoring colors in the NCHANNEL space.

    When i talk with the customers they tell me that they've defined the colors as CMYK and that they haven't done anything to make it defined as NCHANNEL.

    Is there a way to turn off this "feature" in InDesign?

  2. #2
    Greg_Firestone's Avatar
    Greg_Firestone is offline Senior Member
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    Quote Originally Posted by madsk View Post
    Is there a way to turn off this "feature" in InDesign?
    Short answer: There is no button to turn it off, but there may be some workarounds

    Any file you output which does not contain all 4 process plates could contain DeviceN. DeviceN allows for additional channels as well so if you're printing CMYK + Spot, Hexachrome, etc., you can end up with DeviceN. DeviceN can be use for Spot colors, Process colors, or both, depending on the makeup of the file. It's in PDF 1.3 or PS 3 and higher.

    It's possible that using different job options on output can help remedy the problem. Is he using a preset you supplied him or one of the Adobe defaults? Also, what version of ID.

    Greg
    Premedia Software Inc.

  3. #3
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    Colorblind is offline Senior Member
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    Not sure if you're placing the supplied PDF in InDesign and then print to your Roland Versaworks rip but have you tried checking the "Simulate Overprint" in the Output pane of the Print menu (you have to choose composite CMYK) to see if it will rip properly?
    Better train people and risk they leave - than do nothing and risk they stay.

  4. #4
    MickRose is offline Junior Member
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    Default Versaworks

    Have you tried exporting from ID as eps rather than PDF. We use Versaworks & find that eps gives fewer problems (particularly with transparency issues) than PDF. Just a thought.

    Mick

  5. #5
    Al Ferrari is offline Senior Member
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    Quote Originally Posted by MickRose View Post
    Have you tried exporting from ID as eps rather than PDF. We use Versaworks & find that eps gives fewer problems (particularly with transparency issues) than PDF. Just a thought.

    Mick
    This is because eps does not support transparency, so that you end up working with pre flattened output.

    Al

  6. #6
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    michaelejahn is offline Senior Member
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    @ MickRose - yes, what Al Ferrari said - it is not eps that fixes this, it is the flattening - one can either;

    1 - export to PDF/X-1a ( which then tells Adobe PDF Lib to flatten before making a PDF file )

    2. - complain to the support team at Versaworks and tell them it is not 1995 and that they need to support PDF/X-4 workflows where PDF files can contain layers, transparency settings and - perhaps - spot colors - these things can all be managed within both Adobe and Global Graphics / Harlequin RIP for several years now !
    Michael Jahn - Slightly used PDF Evangelist
    Simi Valley California

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    Hey Michael, I like Number 2
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  8. #8
    Correct Color is offline Senior Member
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    Problem with Number 2 is that while it might make you feel better, it won't get the job printed.

    I'd also guess that isn't going to happen anytime soon. All that stuff costs money and in fairness to Roland, Versaworks is an entry-level free product. There are several more robust RIP's out there that will drive a Roland, and solve the problem.

    Mike Adams
    Correct Color
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  9. #9
    Greg_Firestone's Avatar
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    NChannel isn't specific to transparency. It relates to plate colors. You can have a file with no transparency and still have DeviceN or NChannel (depending on your version of PDF). DeviceN is part of Posctscript Level 3/PDF 1.3 and higher. NChannel is an further extension of DeviceN which is backwards compatible and part of PDF 1.6 and higher.

    If NChannel is your problem, a PDF/X-1a should work. If DeviceN itself is not supported, PDF/X-1a might not help.

    Greg
    Attached Files Attached Files
    Last edited by Greg_Firestone; 11-15-2012 at 02:45 PM. Reason: Added a PDF/X-1a sample file with DeviceN
    Premedia Software Inc.

  10. #10
    usbox is offline Junior Member
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    i face same problem here ,if anybody got answer then please share it thanks
    Online Custom Printed Boxes, Wholesale Boxes at very low price.
    www.usboxprinting.com


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