JPS57124741A - Electrophotographic liquid developer - Google Patents

Electrophotographic liquid developer

Info

Publication number
JPS57124741A
JPS57124741A JP56010515A JP1051581A JPS57124741A JP S57124741 A JPS57124741 A JP S57124741A JP 56010515 A JP56010515 A JP 56010515A JP 1051581 A JP1051581 A JP 1051581A JP S57124741 A JPS57124741 A JP S57124741A
Authority
JP
Japan
Prior art keywords
metal
colorant
substituted
pigment
liquid developer
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.)
Granted
Application number
JP56010515A
Other languages
Japanese (ja)
Other versions
JPH0136097B2 (en
Inventor
Shinichi Kuramoto
Junichiro Hashimoto
Kazuo Tsubushi
Makoto Ogawara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP56010515A priority Critical patent/JPS57124741A/en
Publication of JPS57124741A publication Critical patent/JPS57124741A/en
Publication of JPH0136097B2 publication Critical patent/JPH0136097B2/ja
Granted 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
    • G03G9/122—Developers with toner particles in liquid developer mixtures characterised by the colouring agents

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Liquid Developers In Electrophotography (AREA)

Abstract

PURPOSE:To obtain an electrophotographic liquid developer enhanced in polarity controllability and dispersion stability, by adding to a colorant a pigment of metal phthalocyanine or metal-free phthalocyanine substituted by a chloromethyl group. CONSTITUTION:Toner particles consisting mainly of a colorant and a resin are dispersed into an insulating carrier liquid to make an electrophotographic liquid developer, and a pigment of metal phthalocyanine or metal-free phthalocyanine substituted by a chloromethyl group is contained in said colorant. The metal or metal-free phthalocyanine pigment substituted by a chloromethyl group to be used is obtained as a mixture of mono- and di-substituted forms, and it is available on the market actually as the form of mixture. An amount of resin used is preferably 0.1-10pts.wt./1pt.wt. colorant. As the insulating carrier liquid, petroleum derived aliphatic hydrocarbons and their halogenated derivatives, etc. are used.
JP56010515A 1981-01-27 1981-01-27 Electrophotographic liquid developer Granted JPS57124741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56010515A JPS57124741A (en) 1981-01-27 1981-01-27 Electrophotographic liquid developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56010515A JPS57124741A (en) 1981-01-27 1981-01-27 Electrophotographic liquid developer

Publications (2)

Publication Number Publication Date
JPS57124741A true JPS57124741A (en) 1982-08-03
JPH0136097B2 JPH0136097B2 (en) 1989-07-28

Family

ID=11752353

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56010515A Granted JPS57124741A (en) 1981-01-27 1981-01-27 Electrophotographic liquid developer

Country Status (1)

Country Link
JP (1) JPS57124741A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5267331A (en) * 1975-12-01 1977-06-03 Canon Inc Electrophotographic toner
JPS5272232A (en) * 1975-12-12 1977-06-16 Hitachi Ltd Electrophotographic negatively charging liquid developer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5267331A (en) * 1975-12-01 1977-06-03 Canon Inc Electrophotographic toner
JPS5272232A (en) * 1975-12-12 1977-06-16 Hitachi Ltd Electrophotographic negatively charging liquid developer

Also Published As

Publication number Publication date
JPH0136097B2 (en) 1989-07-28

Similar Documents

Publication Publication Date Title
JPS56123544A (en) Composite type electrophotographic plate and electrophotographic method using it
JPS5692545A (en) Electrophotographic developing agent and developing method
JPS5662256A (en) Electrophotographic developer and developing method
JPS57155553A (en) Electrostatic image developing method
JPS5781271A (en) Toner for developing electrostatic charge image and its production
JPS5532073A (en) Electrophotographic developing method
JPS57168255A (en) Two-component developer for electrophotography
JPS57124741A (en) Electrophotographic liquid developer
GB1481035A (en) Liquid developer for use in development of an electrostatic latent image
JPS57124742A (en) Electrophotographic liquid developer
CA2041910A1 (en) Toner and developer compositions with charge enhancing additives
GB2283827A (en) Charge-control agent composition and toner containing this composition
JPS5428141A (en) Liquid developer for static latent image
GB1502745A (en) Electrophotographic developer compositions
JPS5522719A (en) Liquid developer for electrostatic photography
JPS55166652A (en) Electrostatic charge image toner
JPS55124156A (en) Two-color developing method
JPS56121050A (en) Preparation of developer
JPS57204560A (en) Electrophotographic developer
JPS56111856A (en) Electrophotographic toner composition
JPS55166654A (en) Electrostatic charge image toner
JPS57120943A (en) Preparation of developer
JPS6481968A (en) Liquid color developer for electrostatic photography
JPS56100864A (en) Manufacture of black pigment with scatter-preventing quality-upgrading effect
EP0402882A3 (en) Master batch for production of toners used in electrophotography