GB1251979A - - Google Patents

Info

Publication number
GB1251979A
GB1251979A GB1251979DA GB1251979A GB 1251979 A GB1251979 A GB 1251979A GB 1251979D A GB1251979D A GB 1251979DA GB 1251979 A GB1251979 A GB 1251979A
Authority
GB
United Kingdom
Prior art keywords
colour
methacrylate
liquid
styrene
latent image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1251979A publication Critical patent/GB1251979A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/12—Developers with toner particles in liquid developer mixtures
    • G03G9/13—Developers with toner particles in liquid developer mixtures characterised by polymer components
    • G03G9/131—Developers with toner particles in liquid developer mixtures characterised by polymer components obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/01—Electrographic processes using a charge pattern for multicoloured copies
    • G03G13/013—Electrographic processes using a charge pattern for multicoloured copies characterised by the developing step, e.g. the properties of the colour developers
    • G03G13/0131—Electrographic processes using a charge pattern for multicoloured copies characterised by the developing step, e.g. the properties of the colour developers developing using a step for liquid development, e.g. plural liquid color developers
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/12—Recording members for multicolour processes
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/12—Developers with toner particles in liquid developer mixtures
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/01—Electrographic processes using a charge pattern for multicoloured copies
    • G03G13/013—Electrographic processes using a charge pattern for multicoloured copies characterised by the developing step, e.g. the properties of the colour developers
    • G03G13/0133—Electrographic processes using a charge pattern for multicoloured copies characterised by the developing step, e.g. the properties of the colour developers developing using a step for deposition of subtractive colorant developing compositions, e.g. cyan, magenta and yellow

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

1,251,979. Multi-colour electro-photographic process. RICOH K. K. Oct.30, 1968 [Oct. 31, 1967], No. 51524/68. Heading G2H. Multi-colour electro-photographs are made by subjecting a photo-conductive surface to at least three successive treatments each comprising i) uniformly charging said surface, ii) exposing said surface imagewise to a colour component of the multi-colour image to be reproduced, the colour component being different in each treatment, to form a latent image and iii) developing said latent image by applying a liquid developer of a colour selected according to the colour component used to form the latent image, the said liquid developer comprising or dispersion in a hydrocarbon carrier liquid of resistivity at least 10<SP>9</SP> ohm. cm. and dielectric constant not greater than 3 of a toner composed of pigment particles coated with a polarity control resin which is an acrylic, methacrylic, acrylate or methacrylate polymer, the liquid developers used in the said three or more successive treatments being used in the order of increasing solubility of the toner polarity control resin in the carrier liquid. Such an order of use reduces the tendency of a later developer in the successive treatments to remove pigment from an already-developed image. The liquid developers preferably number four, having the colours red, blue, black and yellow and being used in that order. Toner polarity control resins specified include polylsutyl methacrylate, the copolymers butyl methacrylate/styrene, lauryl methacrylate/styrene and lauryl methacrylate/ hydroxyethyl methacrylate and terpolymers of styrene/hydroxyethyl methacrylate/lauryl methacrylate. Conventional hydrocarbon carrier liquids of the naphtha type are used.
GB1251979D 1967-10-31 1968-10-30 Expired GB1251979A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP42069989A JPS525853B1 (en) 1967-10-31 1967-10-31

Publications (1)

Publication Number Publication Date
GB1251979A true GB1251979A (en) 1971-11-03

Family

ID=13418572

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1251979D Expired GB1251979A (en) 1967-10-31 1968-10-30

Country Status (5)

Country Link
JP (1) JPS525853B1 (en)
BE (1) BE723194A (en)
DE (1) DE1806415B2 (en)
GB (1) GB1251979A (en)
NL (1) NL152671B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4869991A (en) * 1988-03-24 1989-09-26 Olin Hunt Specialty Products Inc. Charge director composition for liquid toner formulations

Also Published As

Publication number Publication date
DE1806415A1 (en) 1969-08-14
NL152671B (en) 1977-03-15
DE1806415B2 (en) 1972-01-13
BE723194A (en) 1969-04-01
NL6815551A (en) 1969-05-02
JPS525853B1 (en) 1977-02-17

Similar Documents

Publication Publication Date Title
US3900412A (en) Liquid toners with an amphipathic graft type polymeric molecule
US3753760A (en) Liquid electrostatic development using an amphipathic molecule
GB1030166A (en) Method and means for electrophotographic reproduction in colour
US3657130A (en) Liquid developer for electrophotography
GB1008789A (en) Graphic reproduction processes and materials therefor
GB1283190A (en) Liquid developers for developing electrostatic latent images
US4264699A (en) Liquid developer for use in electrophotography
US3671646A (en) Liquid developers for electrostatic photography
GB1484582A (en) Liquid developers for the development of electrostatic charge patterns
US3909433A (en) Liquid electrophotographic developing compositions
US3874896A (en) Reversible developer for electrostatic latent imaging method
GB1255018A (en) Liquid-development of electrostatic images
GB1356610A (en) Electrophotographic process
GB1251979A (en)
US3850830A (en) Liquid developer containing extender body particles
GB1107897A (en) Method for rinsing electrophotographic plates
GB1398258A (en) Electrophotography
GB1287903A (en)
DE2103045C3 (en) Electrophotographic suspension developer
GB912837A (en) Sensitizable coated paper sheet adapted for electrophotographic reproduction
GB1303871A (en)
GB1309470A (en) Electrophotographic process
US3820986A (en) Liquid development method and materials
GB1208824A (en) A method of electro-statically reproducing a graphic representation
GB1355613A (en) Colour electrophotographic duplication

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee