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Molnfab
Molnfab
Inspiring
November 5, 2025
Question

Convert to PDF/X-1a makes low quality images. (Save as & Preflight)

  • November 5, 2025
  • 1 reply
  • 130 views

Yes unfortunately some printers still demands PDF/X-1a.

 

Problem 1:
When converting to PDF/X-1a, there's no option to choose compression. Instead it uses what was used in the original file. If it's ZIP, it's all fine. But if it's JPEG, even if quality is maximal, it saves in low quality with very visible JPEG-artifacts.

 

Problem 2:
If there're transparent objects that needs to be flatten. They always saves to low quality JPEG. Even if original is ZIP.

 

The cumbersome workaround:

The situation: I have a PDF from a customer, saves as PDFX-4, RGB images (JPEG-max), some transparent objects.

1. Open the file in Acrobat and Save Optimized with ZIP-compression.
2. Use Flattener Preview to flatten transparency (obviously it's not just a previewer). Set compression to ZIP.

3. Now use Preflight to convert to PDF/X-1a.

4. Final step is to Save optimized and choose JPEG Maximal. (Optional. Quality will decrease slightly)

1 reply

Randy Hagan
Community Expert
Randy HaganCommunity Expert
Community Expert
November 5, 2025

I think you have the right workflow. Unfortunately, flattening transparent objects will always be a crapshoot, and one where you're calling for double-sixes every pass. It's very hard to win at that. Your resolution issue can be saved, for the most part, with the workflow you describe.

 

I'm assuming that you are the printer/output provider with an older imagesetter/platemaker/output device that requires PDF/X-1a for reproduction. Is there any reason you can't go back to clients and ask them to use X-1a for work with you? Or better still, provide them with a custom PDF profile that matches your specifications and let the client see what they're going to get as a result before they ship the job to you? Maybe you can provide a custom PDF profile that they install/can set up from your documentation and turn a limitation into a marketing opportunity?

 

It's worth a shot.

 

Randy

Molnfab
MolnfabAuthor
Inspiring
November 5, 2025

Well no I'm the 'man in the middle' fixing other's crap. Been working with pre-press for about 30 years.
This was a case when my client has a client that failed to make a pdf according to the printer's specifications.

I did ask for the original InDesign files. But now I found a way to fix it anyway, with a result close enough to a direct export from InD.

The main reason I wrote, was that this should not need a workaround like this. We should be able to get the same result in just one step. Acrobat is supposed to be a professional app after all.
I'm sure I've sent several crappy files to print in the past, not seeing this.

Randy Hagan
Community Expert
Randy HaganCommunity Expert
Community Expert
November 5, 2025

Been there. You have my deepest empathy.

 

We can't help you make fixes to Acrobat programming. We're just a user-to-user forum, and don't have a say, or the sway, to direct Acrobat programmers to do much of anything. But you do. Make a user complaint through Adobe UserVoice, and you can get to the folks who can fix the problem. This link will get you started. Let Adobe know your situation, and your issues with it, and you can have your complaints heard.

 

Hope this helps,

 

Randy

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