Michael Hennebry wrote: > On Sun, 17 Apr 2016, Michael Hennebry wrote: > >> On Sun, 17 Apr 2016, Michael Hennebry wrote: >> >>> I have an HP Photosmart C3180 All-in-one. >>> As I haven't had any need for color lately, >>> when I last replaced ink, I only replaced the black cartridge. >>> It didn't work, even when printing grayscale-only images, >>> even when telling print-set-up grayscale-only. >> >> To be precise: Black lines were black, >> but pale gray areas were an even paler yellow. >> I've just discoverd that the printer does >> the right thing with text from a pdf. >> The black ink cartridge is getting used, >> just not enough. > > Much to my surprise, the color option black only grayscale > does what I want when printing from a GUI. Have you gone to the CUPS page (http://localhost:631), to the printer, and see if there's an option for grayscale only? mark