JPS5745556A - Electric charge type magnetic toner - Google Patents

Electric charge type magnetic toner

Info

Publication number
JPS5745556A
JPS5745556A JP55120896A JP12089680A JPS5745556A JP S5745556 A JPS5745556 A JP S5745556A JP 55120896 A JP55120896 A JP 55120896A JP 12089680 A JP12089680 A JP 12089680A JP S5745556 A JPS5745556 A JP S5745556A
Authority
JP
Japan
Prior art keywords
electric charge
charge control
control agent
magnetic toner
type
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
JP55120896A
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 JP55120896A priority Critical patent/JPS5745556A/en
Publication of JPS5745556A publication Critical patent/JPS5745556A/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 ground photographic fogs by uniformly dispersing an electric charge control agent in magnetic toner particles and further contg. a specific electric charge control agent of the same polarity on the outside of toner particles. CONSTITUTION:(A) About 30-70wt% magnetic powder of about 0.1-5 microns grain sizes (e.g.; magnetite, ferrite, nickel, iron), (B) about 70-30wt% a binder resin (e.g.; an ethylene-venyl acetate copolymer), and (C) about 1-10wt% an electric charge control agent are uniformly mixed, whereby magnetic toner particles are prepd. Thence, 0.1-10wt% an electric charge control agent of the same polarity as that of the C component is contained on the outside of the particles of the magnetic toners, 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.
JP55120896A 1980-09-01 1980-09-01 Electric charge type magnetic toner Pending JPS5745556A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55120896A JPS5745556A (en) 1980-09-01 1980-09-01 Electric charge type magnetic toner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55120896A JPS5745556A (en) 1980-09-01 1980-09-01 Electric charge type magnetic toner

Publications (1)

Publication Number Publication Date
JPS5745556A true JPS5745556A (en) 1982-03-15

Family

ID=14797670

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55120896A Pending JPS5745556A (en) 1980-09-01 1980-09-01 Electric charge type magnetic toner

Country Status (1)

Country Link
JP (1) JPS5745556A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5053305A (en) * 1988-09-07 1991-10-01 Tdk Corporation Composition and method for developing electrostatic latent images
US5429900A (en) * 1991-10-04 1995-07-04 Hitachi Metals, Ltd. Magnetic developer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5053305A (en) * 1988-09-07 1991-10-01 Tdk Corporation Composition and method for developing electrostatic latent images
US5429900A (en) * 1991-10-04 1995-07-04 Hitachi Metals, Ltd. Magnetic developer

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