I'd bet that you're experiencing the result of mixing transparency and a spot color. It requires overprinting to view correctly. But JPEG doesn't support this:
I cannot get this to fail whether the background rectangle is a spot color or not.
I assume you are exporting from Acrobat? How about exporting the page(s) direct from ID? Both work here just fine.
Take care, Mike
Shadow added in ID to a PNG with transparency. Both the export direct from ID (below) and the export from Acrobat are identical with the exception the page size being larger in the PDF. Rectangle is a Pantone spot.
Didn't I see another thread yesterday with a PNG export problem where the background went black, not white? Someone suggested this might also be a problem with an old PNG that doesn't use an alpha channel for the transparency. Might be worth checking that, too, if the other suggestions don't work.
Thanks for your posts. I will double check some of the suggestions here and get back to you. I should note that I think one of my coworkers uses the same file and template and when he exports, he does not have this problem. I'll double check that this is the same file. Is it possible there is a setting I may have accidently clicked within ID that is causing this and the reason why my coworker does not get this problem on his end?
Peter, the background does go black, but then a white border is also around it. I guess the background went black because that is it drop shadow area with no transparency. I'll see about recreating the PNG in Photoshop myself. As a web designer, I'm used to creating a dropshadow on a logo in photoshop and not deal with having ID create the shadow. I may do it this way if push comes to shove.
Mike, you asked if I was exporting the image directly from Acrobat....well...when I export the file within ID to a PDF, it launches its internal Acrobat dialogue box. That's what I've been doing.
From the first post, I was thinking the work-flow was:
- Export from ID to PDF
- Open PDF following its creation
- Using Acrobat's file menu, export as JPG
As fars as #2 above, if the checkbox in ID's Export as PDF dialog box is checked, the PDF is opened automatically in Acrobat (if installed). Is this what you mean by "it launches its internal Acrobat dialogue box"?
As far as an internal setting, try exporting directly from ID. Select the items to be exported and when you get to the export dialog, make sure the "Selection" setting is chosen. Then you may be able to isolate whether it is ID (cannot imagine) or it is the PDF export profile, or even one of Acrobat's settings for exporting images.
Take care, Mike