Abstract
Toner charge is very important in electrophographic printing process. Toner charge depends on various factors: charging method, materials including additives, and environment. Many studies have been carried out from the various points, but the charging characteristics of toner are not yet understood well. In this study, toner charging characteristics are investigated form the viewpoint of toner shape. A series of toner are prepared from pulverized to several degrees of rounded. Toner charge is measured by E-SPART analyzer. Toner charging carried out as: toner and carrier are kept in standard humidity and temperature more than 24 hours, and they are bottled and the bottle is rotated. The toner charge dependence on toner weight % is obtained. It is found that the toner charge dependence on toner weight % shows different tendency between no-rounded and rounded toner.
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