Title:
電子写真用トナー及びそれを用いた画像形成方法
Document Type and Number:
Japanese Patent JP4305203
Kind Code:
B2
Abstract:
To form an invisible image without decreasing the picture quality of a visible image formed together with the invisible image or to form an invisible image in any region independently of a visible image forming region.
The electrophotographic toner contains a near IR absorbent and a fluorescent brightening agent. The near IR absorbent shows an absorption peak in a 800 to 1,250 nm range and has 10 to 50% absorbance at 380 nm wavelength and 10 to 20% absorbance at 780 nm with respect to the absorbance at the above absorption peak. The fluorescent brightening agent shows a fluorescence peak in a 350 to 450 nm range.
COPYRIGHT: (C)2005,JPO&NCIPI
Inventors:
Kazuhiko Yanagita
Yasuo Matsumura
Shigeru Kiyotoku
Yasuo Matsumura
Shigeru Kiyotoku
Application Number:
JP2004031316A
Publication Date:
July 29, 2009
Filing Date:
February 06, 2004
Export Citation:
Assignee:
Fuji Xerox Co., Ltd
International Classes:
G03G21/04; G03G9/08
Domestic Patent References:
| JP7271081A | ||||
| JP6210987A | ||||
| JP2000352835A | ||||
| JP2000181170A | ||||
| JP11125930A | ||||
| JP2003295496A | ||||
| JP2003076055A |
Foreign References:
| WO1999013382A1 |
Attorney, Agent or Firm:
Kenji Yoshida
Jun Ishida
Jun Ishida