Konica Minolta bizhub PRESS C7000 - Manual (Page 85)

Printing a job that contains grayscale RGB elements using
black toner
1. In the IC-307 print controller, open the job parameters window
and select Color > Ink Saving, and select Print grays using
black toner.
2. Click Submit.
Preserving black color in a job containing grayscale CMYK
elements
1. In the IC-307 print controller, open the job parameters window,
and select Color > Protected colors.
2. In the CMYK area, select Preserve black color.
3. Click Submit.
Printing a job that contains grayscale RGB elements using black toner 75