How to Remove Gray Backgrounds When Printing Scanned PDFs
Question details
The user needs to remove faint gray background boxes and prevent page margins from changing unexpectedly when printing scanned PDF files.
- Product
- Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Printing physical copies of scanned documents where the scanner has captured the paper's slight tint as a gray background.
- Observed behavior
- The printed PDF exhibits faint gray background boxes, and the page margins are altered unexpectedly due to scaling applied during printing.
Verify whether the gray background is visible on your computer screen or only appears when physically printed to determine if it is a scanner capture issue or a printer hardware issue.
Adjust Scanner Settings for Pure White Capture
Modify the background correction settings on your scanner so the paper is captured as pure white, preventing the gray box issue entirely.
The most effective way to eliminate gray backgrounds is to address the issue at the source before the PDF is generated. By increasing brightness or using background correction, the scanner will ignore slight paper tints and shadows.
Launch your device's scanning utility on your computer before creating the PDF.
Locate the color or background correction settings in the scanner options and adjust the brightness and contrast to ensure the background registers as pure white.
Scan the physical document again with the new settings applied and save it as a new PDF file.
Configure Acrobat Print Settings for Scaling and Margins
Adjust the print output scale to 100% to stop Adobe Acrobat from automatically resizing your document and changing the expected margins.
Print Scanned PDFs Flawlessly with WPS Office
WPS Office provides an intuitive PDF reading and printing experience, allowing you to easily adjust document scaling, paper size, and print handling to avoid unexpected margin changes and print artifacts.
- 1. Open PDF in WPS Office: Launch WPS Office and open your scanned PDF document.
- 2. Access Print Settings: Click on 'Menu' in the top-left corner and select 'Print', or use the Ctrl+P shortcut.
- 3. Adjust Page Sizing: In the Print dialog, select 'Actual Size' under the Print Handling options to prevent margin distortion.
- 4. Print the Document: Click 'Print' to send the document to your printer with the accurate scale.
Frequently Asked Questions
Why does my scanner add a gray background to PDFs?
Scanners often pick up the slight off-white tint of physical paper or microscopic shadows as a faint gray color. Adjusting your scanner's brightness, contrast, or enabling background correction before scanning can eliminate this artifact.
Why do my PDF margins change when I print from Acrobat?
Adobe Acrobat frequently defaults to 'Fit' or 'Shrink oversized pages' in its print settings. This automatically scales the document down to accommodate the printer's hardware non-printable margins, resulting in wider margins on the final printed page.
Can I remove the gray background from a PDF that has already been scanned?
Yes. You can use PDF editing software to adjust the image brightness and contrast of the scanned pages, or use a dedicated background removal tool to digitally whiten the document background before sending it to the printer.
