公开(公告)号：AU517256B2

公开(公告)日：1981-07-16

申请号：AU3831678

申请日：1978-07-25

Applicant: MITA INDUSTRIAL CO LTD

Inventor： NAKAZAWA T ,  NAGAHASHI K ,  AIZAWA T

IPC: G03G5/06 ,  G03G5/07 ,  G03G5/09 ,  H01L51/42

Abstract: A photoconductive composition comprises an electron-donating organic polymeric photoconductor (e.g. polyvinyl carbazole), from 0.15 to 0.45 mole, per mole of constituent photoconductor monomer, of an electron- accepting aromatic polycyclic nitro compound (e.g. tri- or tetra- nitro fluorenone), and from 0.2 to 4% by weight, based on the polymeric photoconductor, of phthalo cyanine or a nuclear-substituted derivative thereof. A photosensitive material comprising a layer of this photoconductive composition on a conductive substrate possesses a high saturation charge voltage, high sensitivity and much reduced residual potential, and has excellent mechanical, chemical and electric durabilities. A great number of clear and sharp prints having a high density and being free from fogging can be obtained when this photosensitive material is used repeatedly in electrophotography.

公开(公告)号：US3821113A

公开(公告)日：1974-06-28

申请号：US29771272

申请日：1972-10-16

Applicant: MITA INDUSTRIAL CO LTD

Inventor： MORIKAWA H ,  NAGAHASHI K ,  AIZAWA T

IPC: G03G9/13 ,  G03G9/04

CPC classification number: G03G9/13

Abstract: A liquid developer for electrophotography comprising particles of an image forming material selected from dyestuffs, pigments and powdery metals dispersed in a composite dispersion medium comprising a liquid carrier of high electric resistance and an asphalt extract which is at least substantially completely dissolvable in the liquid carrier and which is obtained by extracting an asphalt with a saturated hydrocarbon liquid, in which the image forming material particles are charged negatively by the dispersion medium, thereby giving a reverse visible image in the case of a negative electrostatic latent image or a nonreverse visible image in the case of a positive electrostatic latent image.