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JPS5745555A - Electric charge type magnetic toner - Google Patents

Electric charge type magnetic toner

Info

Publication number
JPS5745555A
JPS5745555A JP55120895A JP12089580A JPS5745555A JP S5745555 A JPS5745555 A JP S5745555A JP 55120895 A JP55120895 A JP 55120895A JP 12089580 A JP12089580 A JP 12089580A JP S5745555 A JPS5745555 A JP S5745555A
Authority
JP
Japan
Prior art keywords
electric charge
charge control
control agent
magnetic
magnetic toner
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.)
Pending
Application number
JP55120895A
Other languages
Japanese (ja)
Inventor
Koji Noguchi
Takaharu Goto
Yasuto Doi
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.)
Proterial Ltd
Original Assignee
Hitachi Metals 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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP55120895A priority Critical patent/JPS5745555A/en
Publication of JPS5745555A publication Critical patent/JPS5745555A/en
Pending 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
    • G03G9/09—Colouring agents for toner particles
    • G03G9/0906—Organic dyes
    • G03G9/0914—Acridine; Azine; Oxazine; Thiazine-;(Xanthene-) dyes
    • 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
    • G03G9/09—Colouring agents for toner particles
    • G03G9/0906—Organic dyes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE:To obtain images which are superior in density, resolution, etc. and are free from transfer drop-out by uniformly dispersing an electric charge control agent in magnetic toner particles and further contg. a specific amount of an electric charge control agent of the reversed polarity on the outside of the toner particles. CONSTITUTION:(A) About 30-70wt% magnetic powder of about 0.1-5 microns particle sizes of magnetite, or magnetic metals such as nickel, iron and the like, (B) about 70-30wt% a binder resin such as ethylene-vinyl acetate copolymer, and (C) about 1-10wt% an electric charge control agent are mixed uniformly, whereby magnetic toner particles are prepd. Thence, 0.1-10wt% an electric charge control agent of the reversed polarity from that of the C component is contained on the outside of such magnetic particles, whereby an intended electric charge type magnetic toner is obtained. As an embodiment for the electric charge control agents, nigrosine type dyes of positive electric charge type (e.g.; Nigrosine Base Ex), metallized dyes of negative electric charge type (e.g.; Valifast Black 3804), etc. are enumerated.
JP55120895A 1980-09-01 1980-09-01 Electric charge type magnetic toner Pending JPS5745555A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55120895A JPS5745555A (en) 1980-09-01 1980-09-01 Electric charge type magnetic toner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55120895A JPS5745555A (en) 1980-09-01 1980-09-01 Electric charge type magnetic toner

Publications (1)

Publication Number Publication Date
JPS5745555A true JPS5745555A (en) 1982-03-15

Family

ID=14797642

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55120895A Pending JPS5745555A (en) 1980-09-01 1980-09-01 Electric charge type magnetic toner

Country Status (1)

Country Link
JP (1) JPS5745555A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0066470A2 (en) * 1981-05-29 1982-12-08 Mita Industrial Co. Ltd. One-component type developer for electrophotography
JPS58217943A (en) * 1982-06-12 1983-12-19 Tomoegawa Paper Co Ltd Magnetic toner
JPS6356297A (en) * 1986-08-28 1988-03-10 Japanese Res & Dev Assoc Bio Reactor Syst Food Ind Production of starch sugar
JPS6420087A (en) * 1987-07-13 1989-01-24 Kanai Gakuen Immobilization of enzyme or bacterium cell using chitosan-aldehyde gel as carrier
US5053305A (en) * 1988-09-07 1991-10-01 Tdk Corporation Composition and method for developing electrostatic latent images
JPH05119513A (en) * 1991-10-25 1993-05-18 Fuji Xerox Co Ltd Dry toner for developing electrostatic charge image

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0066470A2 (en) * 1981-05-29 1982-12-08 Mita Industrial Co. Ltd. One-component type developer for electrophotography
JPS58217943A (en) * 1982-06-12 1983-12-19 Tomoegawa Paper Co Ltd Magnetic toner
JPS6356297A (en) * 1986-08-28 1988-03-10 Japanese Res & Dev Assoc Bio Reactor Syst Food Ind Production of starch sugar
JPH0365759B2 (en) * 1986-08-28 1991-10-14 Chiyoda Chem Eng Construct Co
JPS6420087A (en) * 1987-07-13 1989-01-24 Kanai Gakuen Immobilization of enzyme or bacterium cell using chitosan-aldehyde gel as carrier
JPH0327198B2 (en) * 1987-07-13 1991-04-15 Kanai Gakuen
US5053305A (en) * 1988-09-07 1991-10-01 Tdk Corporation Composition and method for developing electrostatic latent images
JPH05119513A (en) * 1991-10-25 1993-05-18 Fuji Xerox Co Ltd Dry toner for developing electrostatic charge image

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