[CentOS] how do I use only black ink? success

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