| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.23 ( October 1990 ) R&D of High-Technology Research Laboratories, Commemorating the 20th Anniversary of the Technical Research Division ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Dependence of Xerographical Developability Ferrite Carrier Properties Masashi Fujinaga, Keizou Okuno, Takao Ikeda, Izumi Hoshihara, Yoshitoshi Ikeda |
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Synopsis : The dependence of xerographical developability on carrier properties was studied using commercial plan paper copies. Recently, the steel beads carrier has been replaced by a ferrite carrier as a xerographic developer, but the developability of the latter has not yet been clarified. Measurements of image density, print contrast and the residual toner mass were made to elucidate the relationship between characteristics of the ferrite carrier and its developability. The image density increased, as the dielectric constant of the developer increased and the diameter of carrier beads decreased. The contrast of the print became flatter with an increase in the carrier beads' diameter. The residual toner mass increased as the toner charge distribution broadened. The surface condition of carrier beads effected the toner charge distribution, and a minimum residual toner mass was attained when the sizes of the carrier surface grains were similar to those of toner particles. |
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