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Patent Searching and Data


Title:
TONER AND IMAGE FORMING METHOD
Document Type and Number:
Japanese Patent JP2005049809
Kind Code:
A
Abstract:

To provide a magenta toner with which an image having reduced graininess and roughness from a low density region to a high density region and ensuring a sufficient fixing temperature region can be formed, and a vivid image having a color reproduction range wider than a conventional one and high transparency in an OHP sheet can be formed.

In the magenta toner containing at least a binder resin, a coloring agent and wax, the toner has one or a plurality of endothermic peaks in the temperature range from 30 to 200°C in the endothermic curve measured by differential calorimetry, with the maximum endothermic peak in the endothermic peaks ranging from 65 to 105°C. Further, the magenta toner having 45 to 80% reflectance at 500 nm wavelength and 5 to 30% reflectance at 600 nm wavelength measured by spectroscopic analysis of the toner in a powder state and having 45 to 75 lightness L* is used as a pale magenta toner, and is used together with a deep magenta toner to form a full-color image.


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Inventors:
ITAKURA TAKAYUKI
SATO YOSHIHIRO
FUJIKAWA HIROYUKI
SUGAWARA NOBUYOSHI
TANIGAWA HIROHIDE
Application Number:
JP2003389755A
Publication Date:
February 24, 2005
Filing Date:
November 19, 2003
Export Citation:
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Assignee:
CANON KK
International Classes:
G03G9/08; G03G9/087; G03G9/09; G03G9/097; (IPC1-7): G03G9/09; G03G9/08; G03G9/087; G03G9/097
Attorney, Agent or Firm:
Keisuke Watanabe
Yoshihiro Yamaguchi