Oki C6100dn Guide: User's, C6100 Series (Am English) - Page 181

Black Overprint General Information Black overprint eliminates the white edge between the printed fonts and the colored background. Black overprint can only be used when printing 100 percent black text over a background color. Restrictions 1. Black Overprint may not be available with some software applications. 2. The fonts (characters) must be 100 per cent black. If they are not, they are treated as graphics. Black overprint will not work. Example: If you print large letters on a color background using • a Microsoft Office software application • a True Type font • Windows XP, 2000, or NT 4.0 Black Overprint won't work. Replace the True Type font with a printer font. 3. When the background color is very dark, the toner may not fuse correctly. Change the background color to a lighter color. 4. Black Overprint can only be used in Mac OS 10.x if you are using an application that specifies RGB color space and you are using PostScript Color Matching. For more information, Windows, PostScript: see page 182 Windows, PCL: see page 182 Macintosh OS 9.x: see page 183 Macintosh OS 10.1, 10.2, and 10.3: see page 183 C6100 Series User's Guide 181