Remove stitching in existing PDFs when exporting for screens.

New Here ,
Dec 08, 2020

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I receive PDF files from advertisers that often have the faint "stitching lines". They don't show up in print so it's never been a problem but we now have a digital edition of our magazine and I don't want these lines to show up. I create an indesign file and import pdfs into that file and then create a pdf. I've tried every preset haven't found a solution that works with viewing for screens.

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Correct answer by rob day | Adobe Community Professional

The "stitching" isn’t in the file, but is caused by the reader application’s screen anti-aliasing technique, you can hide the anti-aliasing artifacts in Acrobat by unchecking Smooth line art in the Page Display Preferences.

 

For your online magazine you could remove the stitching by rasterizing the ads into Photoshop with Anti-Aliasing turned off.  That might cause bigger problems with small text and file size, it would depend on the content. You can rasterize at a high resolution, then downsample, which will anti-alias text.

 

Here’s an example:

 

Screen Shot 16.png

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Remove stitching in existing PDFs when exporting for screens.

New Here ,
Dec 08, 2020

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I receive PDF files from advertisers that often have the faint "stitching lines". They don't show up in print so it's never been a problem but we now have a digital edition of our magazine and I don't want these lines to show up. I create an indesign file and import pdfs into that file and then create a pdf. I've tried every preset haven't found a solution that works with viewing for screens.

Adobe Community Professional
Correct answer by rob day | Adobe Community Professional

The "stitching" isn’t in the file, but is caused by the reader application’s screen anti-aliasing technique, you can hide the anti-aliasing artifacts in Acrobat by unchecking Smooth line art in the Page Display Preferences.

 

For your online magazine you could remove the stitching by rasterizing the ads into Photoshop with Anti-Aliasing turned off.  That might cause bigger problems with small text and file size, it would depend on the content. You can rasterize at a high resolution, then downsample, which will anti-alias text.

 

Here’s an example:

 

Screen Shot 16.png

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Dec 08, 2020 0
Most Valuable Participant ,
Dec 08, 2020

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You cannot put an egg back in the shell after you make an omellet. The damage is done.

Tell the advertisers to provide PDF/X4 files.

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Dec 08, 2020 0
Engaged ,
Dec 08, 2020

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Nothing you can do, really. What is happening is that transparency flattening is creating small chunks of areas that are flattened and are abutting each other. As you have noticed, this is fine in print, but the lower resolution of the screen view may* (*totally will) pick up the edges of them. and, without the source there's no way to go back. A suggestion: for your digital edition, render the entire offending ad into an image. e.g. open their pdf in Photoshop and render it at 300dpi in cmyk. This will cause issues with smaller type since you will likley downsample the image further when you make your pdf, but at least the lines are gone. More work at your end, sadly, because trying to explain to your clients why their badly-created pdfs look bad because of the thing they did will be difficult.

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Dec 08, 2020 0
Adobe Community Professional ,
Dec 09, 2020

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The "stitching" isn’t in the file, but is caused by the reader application’s screen anti-aliasing technique, you can hide the anti-aliasing artifacts in Acrobat by unchecking Smooth line art in the Page Display Preferences.

 

For your online magazine you could remove the stitching by rasterizing the ads into Photoshop with Anti-Aliasing turned off.  That might cause bigger problems with small text and file size, it would depend on the content. You can rasterize at a high resolution, then downsample, which will anti-alias text.

 

Here’s an example:

 

Screen Shot 16.png

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Dec 09, 2020 1
New Here ,
Dec 09, 2020

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Thank you everyone. After posting this, I realized that the ads submitted by some of the advertisers don't have the stitching but after I export using my printer's required settings the stitching appears. I had created digital layout by importing the printer files into indesign and exporting using the "smallest file size" PDF setting, so I guess I'll have to use the originals for the online version.

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Dec 09, 2020 0