The Paper's Abstract of The 3rd
International Conference on Imaging Science and Hardcopy
　

　

Surface Coverage Normalization in Xerographic Developers

 　
　 　

May 26-29,1998
Chongqing China

Paul C. Julien

Wilson Center for Research and Technology, 114-22D
Xerox Corporation,  Webster, New York, USA

　
　 Abstract:
　    Most models of toner charging focus on charge exchange per unit area of  toner or carrier. If surface additives are blended onto toners of different size at equivalent surface area coverage, the electrostatic  character of the surfaces should be comparable.  At the same time, for  the charging against carrier to be equivalent the toner concentration  must be adjusted for toner size to retain the same surface area  coverage of carrier by toner.  If these criteria are met then the  charge per unit toner surface area should be constant.  A set of four  toners at 8, 12, 15, and 19 microns was used to test this concept by  first blending the base particles with a silica surface additive  (Cabosil TS530) at several surface area loadings and then mixing the  resultant toner/silica blends with a ferrite carrier.  At each surface  area coverage of silica, all the sizes had the same values of average  charge divided by diameter squared.  However, within each developer  sample, charge was not proportional to diameter squared but rather to  diameter due to charge exchange among the different sizes in the sample.

　

中国复印科学与工程学会
Reprographic Scientists and Engineers Society of China 
7 Chang-Tu Rd.Tianjin300131,China  Tel:(22)26669189 Fax: (22)26669189 
E-mail: rsesc@public.tpt.tj.cn
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