(19)
(11) EP 0 246 622 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.03.1990 Bulletin 1990/12

(43) Date of publication A2:
25.11.1987 Bulletin 1987/48

(21) Application number: 87107293.0

(22) Date of filing: 19.05.1987
(51) International Patent Classification (IPC)4: G03G 9/08, G03G 9/14
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 22.05.1986 JP 117066/86

(71) Applicant: MITSUBISHI KASEI CORPORATION
Tokyo 100 (JP)

(72) Inventors:
  • Yoshitomi, Toshihiko
    Yokohama-shi Kanagawa-ken (JP)
  • Yushina, Heihachi
    Machida-shi Tokyo (JP)
  • Horiuchi, Hiromi
    Tokyo (JP)
  • Yamaguchi, Yukio
    Kawasaki-shi Kanagawa-ken (JP)
  • Kamoshita, Yasuo
    Yokohama-shi Kanagawa-ken (JP)
  • Sekihara, Kiyoshi
    Tsukui-gun Kanagawa-ken (JP)

(74) Representative: TER MEER - MÜLLER - STEINMEISTER & PARTNER 
Mauerkircherstrasse 45
81679 München
81679 München (DE)


(56) References cited: : 
   
       


    (54) Magnetic toner


    (57) An insulative magnetic toner disclosed herein comprises a magnetic powder, a negative charge control agent, a binder resin and a compound having phenazine ring amorphous-silicon photoreceptor.
    The magnetic toner according to the invention is effective for preventing the occurrence of picture image blurring under high humidity when used in an amorphous-­silicon photoreceptor.





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