EFFECT OF DEVELOPER PROPERTIES ON PRINT QUALITY |
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| Authors: | Suchapa Netpradit Suda Kiatkamjornwong Yujiro Ando Takeshi Ikeda |
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| Affiliation: |
a Department of Imaging and Printing Technology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
b Technical Education Department, Research and Development Headquarters, Canon Incorporated, Ohta-ku, Tokyo, Japan.
c Electrophotography Research Center, Canon Incorporated, Susono-shi, Shizuoka, Japan |
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| Abstract: | We investigated the dependence of the toner charge-to-mass ratio (q/m) in a two-component electrophotographic developer on the shaking time, toner concentration (T/C), carrier sizes, and the carrier core and the coating materials, as well as the resulting print qualities in terms of print density, background density, tone reproduction, resolution, and dot gain. Four different sizes of spherical ferrite carriers, four different carrier coating materials, and an irregular iron carrier were used with two types of toner: 14 um red toner (NP-4080) and 8 um cyan toner (CLC-500). The q/m measurement by the blow-off method showed that the red toner charge was positive while the cyan toner charge was negative with these carriers. The toner q/m values, which depended on the shaking time and decreased with the increasing T/C were much more affected by the larger carrier and the smaller toner. The carriers which yielded charges in the proper range produced better print qualities than did the other carriers that yielded a toner q/m |
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