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 Image forming process with magnetic brush development

Details
Inventors: Yamamoto, Yoko; Shigeta, Kunio; Takahashi, Jiro;
Assignee: Konishiroku Photo Industry Co., Ltd. (Tokyo, JP)
Primary Examiner: Martin; Roland E.
Assistant Examiner:
Attorney, Agent or Firm: Frishauf, Holtz, Goodman & Woodward

In a process for forming an image comprising; (i) forming a latent image on a latent image bearing member comprising an organic photoconductive photosensitive member; (ii) forming a magnetic brush with a two-component developer comprising a toner and a carrier on a developer conveying support arranged as opposed to the latent image bearing member; and (iii) developing the latent image by brushing it with the magnetic brush in a developing region; the improvement wherein an absolute value of a maximum potential (V) of a charge for forming the latent image is from 400 to 700, a minimum value of a gap between the photosensitive member and the developer conveying support is from 0.30 to 0.65 mm, the carrier comprises a core material and a polymer comprising a monomer component represented by the followng formula (I), (II) or (III): ##STR1## wherein R.sup.1 and R.sup.2 each represent a hydrogen atom or a methyl group; each of n and p represents an integer of 1 to 8; each of m and q represents an integer of 1 to 19; X.sup.1, X.sup.2, X.sup.3 and X.sup.4 each represent a hydrogen atom, a chlorine atom, a fluorine atom, a lower perfluoroalkyl group or a lower perfluoroalkoxy group, which may be either identical or different, and at least 2 of X.sup.1, X.sup.2, X.sup.3 and X.sup.4 are fluorine atoms. According to this process, clear images with high image density and yet without image irregularity can be stably obtained.

DETAILED DESCRIPTION This invention has been accomplished under the state of the art as described above and its object is to provide an image forming method capable of forming an image which is free from irregularity and of high quality having a high image density for a number of times stably.
The above object can be accomplished by, in a process for forming an image comprising; (i) forming a latent image on a latent image bearing member comprising an organic photoconductive photosensitive member; (ii) forming a magnetic brush with a two-component developer comprising a toner and a carrier on a developer conveying support arranged as opposed to said latent image bearing member; and (iii) developing said latent image by brushing it with said magnetic brush in a developing region; the improvement wherein an absolute value of a maximum potential (V) of a charge for forming said latent image is from 400 to 700, a minimum value of a gap between said photosensitive member and said developer conveying support is from 0.
30 to 0.
65 mm, said carrier comprises a core material and a polymer comprising a monomer component represented by the following formula (I), (II) or (III): ##STR2## wherein R.
sup.
1 and R.
sup.
2 each represent a hydrogen atom or a methyl group; each of n and p represents an integer of 1 to 8; each of m and q represents an integer of 1 to 19; X.
sup.
1, X.
sup.
2, X.
sup.
3 and X.
sup.
4 each represent a hydrogen atom, a chlorine atom, a fluorine atom, a lower perfluoroalkyl group or a lower perfluoroalkoxy group, which may be either identical or different, and at least 2 of X.
sup.
1, X.
sup.
2, X.
sup.
3 and X.
sup.
4 are fluorine atoms.



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