Can I set my printer (HP C4780) to use tri-color cartridge instead of black one? (I buy both in a package but only seem to use the black. Now have 8 new tricolors and no black).
Err, can you just buy black separately? Using three colors together instead of black usually won't give you a crisp black; that's one of the two reasons most printers take four cartridges. The other is that the black is supposed to be cheaper.