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A
Anonymous
April 27, 2017
Answered

Gradient banding from PDF

  • April 27, 2017
  • 2 replies
  • 3307 views

How can I fix banding in a PDF exported from InDesign? The problem I'm having is the file is a PDF and I do not have access to the source InDesign file so I do not have layers. Is there anyway to fix it from the flattened file? Every fix I've seen requires I be able to adjust just the gradient layer itself.

    This topic has been closed for replies.
    Correct answer Steve Werner

    There is no way to edit a PDF file to fix a banding problem without access to the file which produced the PDF, sorry.

    2 replies

    Dov Isaacs
    Dov Isaacs
    Legend
    April 27, 2017

    Not only can't you fix the such an issue in Acrobat, but it is very unclear whether even having access to the InDesign file would help you either.

    Gradients created natively in InDesign use PDF smooth-shaded gradients which should not cause you any banding issues, unless you have a problematic RIP or printer.

    But you mentioned that “the InDesign file pulls elements from an EMS file.” An EMS file is a eMachineShop CAD Design File. InDesign doesn't directly place such files, but it is entirely possible that whatever created the content in a CAD program likely was simulating gradients with either raster images or adjacent-slightly-varying-color narrow polygons. In either case, such “gradients” are very likely to have banding and other issues since they don't use PDF smooth-shaded gradients.

              - Dov

    - Dov Isaacs, former Adobe Principal Scientist (April 30, 1990 - May 30, 2021)
    A
    Anonymous
    April 27, 2017

    I've been trying to smooth it out in photoshop by isolating the the gradient area as a new layer. It's strange because I've had almost an identical file printing fine, but this one has far more banding when printed than last time. I've gotten most of the banding out but now there is a halo around the edge of the gradient area with a green tint (gradient is blues)

    Steve Werner
    Community Expert
    Steve WernerCommunity ExpertCorrect answer
    Community Expert
    April 27, 2017

    There is no way to edit a PDF file to fix a banding problem without access to the file which produced the PDF, sorry.

    A
    Anonymous
    April 27, 2017

    Sigh. That's what I was afraid of. The InDesign file pulls elements from an ems file that I don't have access to. Thank you.

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