Fix PDF Printing as a Mirror Image on Imagesetter or RIP
Question details
The user needs to identify why a PDF document displays correctly on the screen but prints backwards or mirrored when processed through a RIP or imagesetter.
- Product
- PDF Printer Drivers and RIP Software
- Device & OS
- not provided
- Scenario
- Outputting a design file to film or plate via a prepress imagesetter.
- Observed behavior
- The printed output is horizontally flipped (mirrored) compared to the original on-screen PDF file.
Verify that your original PDF displays correctly on your monitor in a standard PDF reader before altering any hardware or RIP configurations, ensuring the issue is not embedded in the file itself.
Check RIP Software and Printer Driver Output Settings
The mirroring command is typically applied during the prepress stage rather than within the PDF creation process. Disabling the mirroring option in the output configuration is the most direct fix.
When a file looks fine in a PDF reader but prints backwards, the transformation is almost always applied by the print driver or the Raster Image Processor (RIP). Prepress workflows often have default settings like 'Emulsion Down' that automatically flip the image.
Go to your computer's print dialog and select the specific imagesetter or RIP printer you are trying to output to.
Click on 'Properties', 'Preferences', or 'Advanced Settings' to access the driver options.
Look for checkboxes or dropdowns labeled 'Mirror', 'Reverse', 'Emulsion Down', or 'Flip Horizontally'. Change this setting to 'Emulsion Up' or simply uncheck the mirror option.
If you are using a standalone RIP software interface, open the active job ticket or queue settings and ensure the page orientation is set to standard (Right Reading).
Send a small test page through the RIP to confirm that the mirroring issue is fully resolved.
Print and Verify PDFs Accurately with WPS Office
Use WPS Office's built-in PDF tools to review your document's layout, check for unintended page transformations, and manage standard print settings before sending it to professional prepress software.
- 1. Open your PDF: Launch WPS Office and open your PDF file to verify it displays accurately on screen.
- 2. Access Print Settings: Click on the 'Print' icon or press Ctrl+P to open the print dialog.
- 3. Review Printer Properties: Click 'Properties' next to your selected output device to ensure no accidental mirroring or layout options are active.
- 4. Print a Test Page: Print a standard copy to a local office printer to verify the baseline layout before sending the file to the RIP or imagesetter.
Frequently Asked Questions
Can saving a PDF from Adobe Illustrator cause it to print mirrored?
Generally, no. If the exported PDF looks correct on screen in a standard PDF viewer, the mirroring is not embedded in the PDF data itself. The reverse transformation is almost always applied at the printer driver or prepress RIP level.
What does 'Emulsion Down' mean in prepress printing?
'Emulsion Down' is a common prepress output setting used when making printing plates or film. It deliberately causes the image to print as a mirror image so that it is oriented correctly when transferred to the physical printing press. If accidentally selected, your output will be reversed.
Why does my RIP software override my PDF document settings?
RIP (Raster Image Processor) software is designed to handle the specific physical requirements of outputting to plates and film. It applies its own queue settings, layout transformations, and color separations at the very last step before printing, which supersedes the original PDF's display rendering.
