Toner charge is very important in electrophotographic printing process. Although many studies on toner charging have been carried out, the process is very complex and the understanding of toner charging characteristics is not yet sufficient. In this paper, toner charge distribution is measured by E-SPART (Electrical Single Particle Aerodynamic Relaxation Time) analyzer, which can measure the size and charge of toner. The measured toners are polymerized and pulverized type. Charging is carried out as follows : the toner is mixed with the carrier and the mixture is bottled into the roller, and mixed by rotating the roller. Toner charge dependences on toner wt% are compared between polymerized and pulverized toner.
Hidetaka Ishihara, Yasushi Hoshino, "Charging Characteristics of Polymerized and Pulverized Toner in the Roller Rotation Mixing System of Toner and Carrier" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP19), 2003, pp 161 - 164, https://doi.org/10.2352/ISSN.2169-4451.2003.19.1.art00039_1