Taco Hoekwater wrote:
Just curious: why do you need a cmyk pdf document? I'm asking because the requirement often implies that you are using a less-than-modern printing house. If that is the case, you may be better off using PostScript instead of PDF.
Last time I prepared a file for Springer Heidelberg, they explicitly wanted a cmyk pdf file, too. I have no idea what printing house they contacted. I ended up converting those images to appear in color into cmyk jpegs in Photoshop (next time I'm going to try “convert” with “-colorspace cmyk” instead) and the printing house slightly grudingly accepted rgb grey scale images for the bulk of the book.
regards, Christopher Creutzig