Adjust [Toner Density] in the printer driver to a darker setting.
1 Display the setting screen of the printer driver.
How to display
(The procedure may differ depending on the application you are using.)
- Select [Print] from the [File] menu in the application.
- Select this printer, and then click [Properties] or [Preferences].

2. Display the [Advanced Settings] dialog box.
- Display the [Quality] sheet.
- Click [Advanced Settings].

3. Adjust the toner density.
- Select [Toner Density].
- Select and adjust the toner density to a darker setting.
- Click [OK]. Then, the [Quality] sheet reappears.

4. Click [OK].