I'm creating a picture book in Indesign. I've placed ai illustration files in the document, and in front of them a png image. My printer wants the work flattened. When exported to pdf and flattened, the outlines of the vector graphics show as grey outlines through the image. No help from Adobe representatives. Desperate for suggestions....
Try to adjust the PDF output settings in the dialog that appears when you choose to export. Or get the output settings from your printer. They should be able to supply you with a PDF preset that they use when the rip files themselves. Otherwise try using "PDF/X-1a:2001".
Open the illustrator vector file, select everything and covert paths to outlines, then merge everything so the file doesn't have a gajillion points.
Check to make sure you don't have a transparent stroke set on the paths.
That's all I have. Good luck. Hope those work for you.
This sort of looks sort of like the old transparency flattener bug, which was a real nightmare in early versions. You wouldn't by chance be using an old version like CS1 or CS2, would you?
If so, you can spend hours trying to fix it with uncertain success. The simple workaround is to composite your graphics in Photoshop, save a JPEG and place the composited image in Photoshop.
I would not let the pdf exporter make the process for me.
In my opinion it is "bad" planning. I insist that an output document should contain one layer of texts, and some simple vector elements and the rest on a flat, non transparent bitmap.
I do not know how many images you have, but I would export them in Ilustrator and link a bitmap version.
One option to skip the "re-link" option is to save a copy of your Ilustrator's editable artwork, and convert internally the ilustrations to bitmaps.