Re: My book printer states that black is printing as four-colour. My preflight report on Rich Black issues, shows no problems. How do I create the PDF so that there are no four-colour blacks on any digital printer?

Actually if you are creating PDF from Microsoft Office on Windows using the Adobe Save as PDF feature, there is a way to set the joboptions. Select High Quality Print and all R=G=B text and vector graphics will become DeviceGray in the resultant PDF. DeviceGray will be properly handled as CMYK=(0,0,0,1-G) on the RIP. The default Standard joboptions cause everything to be converted to sRGB.

           - Dov