Using less color ink as possible

[MLB44]

Which print option uses less of the color cartridges, "Black Ink only" OR "Grayscale Off".  Is there any option that uses ONLY the black ink cartridge?

[Valsimot]

• Black & White or Black Ink Only: The printer uses only the black ink cartridge to produce a black & white print out. Any colors present in an original document or photo are converted to black. Select this setting when you want to print only with the black ink cartridge.
• Grayscale: The printer uses a mix of color inks to produce a high quality black printout. Select this setting when you want high quality black & white documents or photos.