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I have an InDesign print document with several Illustrator .ai
vector files. When I export the PDF, I believe the vector graphics are being rasterized at lower than 200 DPI. (I'm receiving a warning that an image is under 200 DPI from a service I upload the PDF to. They didn't say which, but I have narrowed it down to the vector graphics.) I have looked through the PDF export options and see nothing that mentions vector graphics. Where can I set this?
I believe it is being rasterized. If I open it in Photoshop and browse the individual images, I see chunks of the graphics that were vectors. Opening these results in a low resolution bitmap graphic. I should mention that I am using the
PDF/X-1a:2001
standard withAcrobat 4 (PDF 1.3)
compatibility. If the option to rasterize everything includes text, it's not selected because text exports as text. Otherwise, where can I find the option to rasterize everything as you mentioned? – Keavon – 2014-01-01T10:30:11.020Photoshop automatically rasterizes everything if you open a non-Photoshop PDF. – None – 2014-01-01T16:01:38.157
The original Illustrator file may contain raster-based effects, which I believe are not touched by InDesign. So I'd first check that the file's raster effect resolution is set to 200 or 300dpi. (When you start an illustration as an RGB/Web/Screen-type document in Illustrator, it's set to 72dpi by default.) Open the illustration in Illustrator and check:
Effect > Document Raster Effects Settings…
– TehMacDawg – 2014-01-02T09:35:18.823Also, there is a preflight feature in InDesign that lets you check the document against selectable pre-press requirements. Go
– TehMacDawg – 2014-01-02T11:46:06.940Window > Output > Preflight
and click the corner drop-down menu to define a new Preflight Profile. In the list of selectable test criteria, expandIMAGES AND OBJECTS
and, underImage Resolution
, checkmark and/or type in the minimum value required (250 or 300dpi). Problematic images will then be listed in the panel. See InDesign Help: http://help.adobe.com/en_US/indesign/cs/using/WSa285fff53dea4f8617383751001ea8cb3f-7060a.html