Top Page > Troubleshooting: TCRU/ORU > Troubleshooting Image Quality Problems > Density Problems > Color (1): Black Faint During Full Color Printing > Cause:
If black is used when printing in full color mode with black toner only, the printing may become faint.

To adjust the following settings, pre-register the type of paper in use as a custom paper. For details about registering custom papers, see "Registering a Custom Paper", Paper Settings Reference.