Is there any quick way to convert a PDF (comprising mainly vector graphics) to PURE CMYK Black (K Only)?
This needs to be done for printing purposes (what the printing studio requires).
The source file is actually from omnigraffle, and it is too large to manually convert every single object to CMYK black (within omnigraffle). I could also try to do it within illustrator, but alas, also super time consuming.
Tried googling but didn't notice any "quick" solution (there was one complicated one involving a linux program).