On grayscale jobs, I have noticed that when I create graphics in Quark or Illustrator using 100%k that the PDF outputs look dull, like about 85%k. Is there a way to get these PDFs to look richer without tagging the job outside of the grayscale color space? If I output the PDF from Quark as CMYK, the blacks look right but I would hate for a printer to assume that this is a 4 color press run. Any ideas? Thanks