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axel_7277
Participating Frequently
August 21, 2025
解決済み

Signature image appears blurry and discolored

  • August 21, 2025
  • 返信数 1.
  • 2640 ビュー

Hello Adobe Community,

I’ve encountered a rendering issue in the latest release of Adobe Acrobat Reader DC (64-bit, Windows 11, 25.001.20630).


When using qualified electronic signatures (QES) created with Digiseal desktop software, the signature image inside the signed PDF looks blurry, slightly grayish, and less color-accurate in the latest Acrobat Reader DC.

 

However:

  • In older Acrobat Reader DC  of this year versions (e.g. 25.001.20577,), the same signed PDF displays the signature image perfectly — sharp and color-accurate.

  • In other PDF viewers (Edge, Foxit, Sumatra, etc.), the PDFs also display perfectly.

 

If i print the file the ourcome is terrible.

 

I tried a lot with Digiseal to use different images and formats, field sizes, image sizes. Sometimes it gets a little better but nothing works like it did before.

 

As this is a big deal for me i would welcome any help or insights that could help me out!

Thanks a lot!

    解決に役立った回答 Amal.

    Hi there 

     

    Thanks for sharing the details. 

     

    Please give us some time to get this checked by our development team. We will share the update soon.

     

    ~Amal


    Hi there, 

     

    Our team has checked the details you shared and found that you are using the 32-bit version of the Acrobat Reader application. They are working on a fix for this issue. We will share the update as soon as we get more information. 

    As a workaround, you can try using the 64-bit version of the Acrobat Reader application here: https://get.adobe.com/reader/enterprise/  and see if that works for you. 

     

    ~Amal

    返信数 1

    Amal.
    Community Manager
    Amal.Community Manager
    Community Manager
    August 21, 2025

    Hi there,

     

    Hope you are doing well and thanks for reaching out and for providing such detailed information about the issue.

    From what you describe, the problem seems specific to the latest release of Acrobat Reader DC (25.001.20630) and how it renders the signature appearance from Digiseal QES. Since the same PDF displays correctly in earlier Acrobat versions and in other PDF viewers, this points to a rendering change or regression introduced in the new build.

    A few things you can try:

    1. Check other digital signatures: Please try to use a different digital signature (other than Digiseal QES) and check if the issue exists. Try to create a new digital signature as described here: https://adobe.ly/4oNbvKH 

    2. Check your rendering preferences: Go Preferences (Ctrl,Cmd+K) > Page Display and select Smooth Images or change the Rendering settings to see if this improves clarity.

    3. Test with “Enable Enhanced Security” disabled: Sometimes, security restrictions can affect how signature appearances load. Go to Preferences (Ctrl,Cmd+K) > Enhanced Security > Turn Off the Protected mode at start up and Uncheck , enhanced Security > Click OK and reboot the application and see if that helps.
    Note: Please turn on the security after testing to avoid any security risk.

     

    Let us know how it goes. 

     

    ~Amal

    A
    axel_7277作成者
    Participating Frequently
    August 21, 2025

    Hi, thanks for your suggestions. I tested the proposed steps, but unfortunately the issue persists:

    1. Testing with a different digital signature
      I created different signatures that did not work out. The issue still occurs. 

    2. Disabling Enhanced Security & Protected Mode
      I turned off both “Enable Protected Mode at startup” and “Enable Enhanced Security” in Preferences and restarted Acrobat.
      → No improvement, the problem remains.

    3. Checking rendering preferences
      I have tested changing the the settings, but the problem also exists across different signature images and formats, and it only affects the latest Acrobat Reader DC builds.
      Since the same PDFs display perfectly in older Acrobat Reader DC versions and in other PDF viewers, this strongly suggests a regression in the current rendering engine rather than a configuration problem on my end (?)

    4. Could you please escalate this issue to the engineering team? It seems specific to how Acrobat now renders signature appearance streams in the newest release.

    MikelKlink
    MikelKlink
    Participating Frequently
    August 21, 2025

    Can you share an example PDF illustrating the issue for analysis?

    quoteCould you please escalate this issue to the engineering team? It seems specific to how Acrobat now renders signature appearance streams in the newest release.

     

    Please be aware that the issue might not be an error of the newest Acrobat but actually a fix in it; the way the software in question creates the appearance might be wrong and only an error in earlier Acrobat versions might have allowed it to render as intended; other PDF viewers might have followed Acrobat in that error. 

    (I don't say that necessarily is the case, but it just might be.)

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