For the PCL 6 printer driver

Click the WordPad menu button in the upper left corner of the window, and then click [Print].

In the "Select Printer" list, select the printer you want to use.

Click [Preferences].

Select [Black and White] in the "Color/ Black and White:" list.

Change any other print settings if necessary.

Click [OK].

Start printing from the application's [Print] dialog box.