I just solved this problem. To note where I was coming from, I am making a book, all my blacks in the document were "Rich Black" (60/40/40/100). When I had the Indesign "Book" open, I would export it to PDF and you could tell all the blacks were dark grey. In the past I had used the same documents and created PDFs that were on the screen as 100% black (obviously as RGB).
Here is what solved it ... starting from the "book":
- Click on the drop down arrow in the corner of the dialog box
- Choose "Export Book to PDF ..." (you'll see it do some thinking and then you'll chose where to save it).
- Next you have some options under and "Export Adobe PDF" dialog box.
- Choose the high quality print, but VERY IMPORTANTLY, in the section "Options", make sure that "Optimize for Fast Web View" is NOT selected
- Next, along the left is a menu. Choose "Output". In the "Color" section of this, you'll have three drop downs. For the Color Conversion drop down, choose "Convert to Destination (Preserve Numbers)", for the next drop down choose "U.S. Web Coated (SWOP) v2", for the third "Include Destination Profile".
Then, make your booky wook and live happily ever blacker.