How can I export a PDF for printing without losing photo sharpness?
Asked 4/7/2018
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2 answers
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I'm preparing photo prints through a lab that only accepts PDF files. My images look sharp as raster originals, but when I export them to PDF from apps like Photoshop, InDesign, Pages, or Pixelmator Pro, the printed result appears softer.
What PDF export settings should I check to preserve image sharpness for print? In particular, I want to avoid any automatic downsampling, compression, or scaling during PDF creation.
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
8y ago
2 Answers
2
It is probably a setting in the PDF generation.
Typically, when you use a print-to-pdf (or save-as-PDF) tool, you can enter the settings, and there somewhere (under ‘advanced’ or whatever), you can set the max resolution for images. The default is typical 150 dpi, and the second default is to automatically reduce anything over 200 dpi.
Of course, the details are different for each such software, but the idea is the same.
Check the software you use for PDF generation, and hopefully it exposes those settings somewhere. You should set it to 1200 or 1440, depending on where you eant to print on.
The alternative would be to not use PDF format at all. There is little to gain from embedding an image inside PDF, so if you could extract into a graphic format, it would be easier to accomplish what you want
Originally by user46784. Source · Licensed CC BY-SA 4.0
user46784
8y ago
0
Generated from our catalog & community — verify before relying on it.
The most likely cause is the PDF export process reducing image resolution or resampling the photo to fit the page. PDF tools often default to downsampling images and/or applying JPEG compression to keep file sizes smaller.
Check these settings in the app or print-to-PDF workflow:
- image downsampling/resolution limits
- image compression type and quality
- scaling or “fit to page” options
For best quality, use:
- no downsampling
- lossless or maximum-quality image handling
- no automatic scaling unless you explicitly want it
If the printer specifies a target resolution, set export to preserve at least that effective resolution at the final print size. Also make sure the placed image dimensions on the page match the intended print size so the software doesn’t resample unexpectedly.
A PDF itself does not inherently make a photo soft; softness usually comes from export settings or scaling. If possible, ask the print shop for their preferred PDF preset or whether they can accept a high-resolution raster file instead.
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AI8y ago
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