zero2dash: I do not see the option to convert all type to outlines anywhere when I export as PDF. Is it somewhere else? Thanks!
I checked around and you're right...when you export a PDF in InD, there are no options to convert type to outlines or leave native.
I know those options exist under Acrobat when printing a PDF, and also under Illustrator I believe - but nothing under InDesign. Still, it looks like somehow, somewhere your type is converting to outlines. Rather than exporting a PDF, try printing one (to the Distiller printer, which is listed as Adobe PDF in the print window). Check around in the options to make sure it doesn't outline the type though.
If that doesn't work, you could export as Encapsulated Postscript (EPS) as decksnap said, but to disagree with what he said - this is not an on-screen only thing. I've noticed this problem for awhile now, and outlined type being thicker is not exclusive to on-screen because you can print those thicker type documents and
they will print with the thicker type as well. I've even had our outsource guy who provides us with negs for offset press tell me that it looks thicker on screen but doesn't print that way; well I've printed these documents to 3 Postscript printers and all 3 print them thicker, so...IME they do print that way.
Good luck...if that doesn't work either, post again and I'll see what else I may be able to come up with.
