Oki Pro7411WT - Gray Scale (White) Print

Color setting > 25
G RAY S CALE (W HITE ) P RINT
Select this when printing documents using only white toner without using CMY toner.
Windows
1. On the print dialog box, click the Color tab.
2. Under Color Mode, select Gray Scale (White) Print.
Mac OS X
1. On the print dialog box, select the Printer Features panel.
2. From the Feature Sets menu, select Color Option.
3. From Color Mode, select Gray Scale (White) Print.
NOTE
To use this setting, you need to create data as gray scale data in an
application. Save data with the gray scale or monochrome mode. The color
data cannot be converted to Gray Scale (White) Print automatically.