ABSTRACT
The major effects of a carbon black on toner are on the electrical charging and melt flow properties of the particles. While there has been a growing interest in color inks in the last few years, carbon black has continued to be the most important pigment. While the chemical nature of the carbon black itself is important in triboelectric charging, it is also true that the morphology of the carbon blackpolymer composite should play a role. Contemporary toners typically contain more ingredients than simply carbon black and polymer. The effect of the carbon black on the rheological properties is likely to be quite small at the levels currently used in toner. Carbon black is an important pigment for use with xerographic toners. Positive toners usually have special chemicals to control the magnitude and speed of charging. Surface flow enhancers also have a dramatic effect on charge.
