ss writes:

On my black ink it is printing gray, installed a new black ink
cartridge and have unchecked grayscale. Cartridge is full of ink.

Is this an old thread, or did you not provide any information on your
printer at all? That would be helpful!

Possibilities:

1) if test pattern looks bad, you have blocked nozzles preventing good
coverage. So you should clean the printhead. If the printhead is on
the cartridge, this will not apply to a new cartridge.

1) if black looks gray, you could be using a really low-quality draft
mode, which always looks gray rather than black. Try a higher
quality.

3) you could be using composite black instead of real black, which
again looks gray since it is made up of CMY color.
--
Gernot Hassenpflug