JPS5526588A - Preparation of magnetic toner - Google Patents

Preparation of magnetic toner

Info

Publication number
JPS5526588A
JPS5526588A JP15942878A JP15942878A JPS5526588A JP S5526588 A JPS5526588 A JP S5526588A JP 15942878 A JP15942878 A JP 15942878A JP 15942878 A JP15942878 A JP 15942878A JP S5526588 A JPS5526588 A JP S5526588A
Authority
JP
Japan
Prior art keywords
toner
magnetite
attachment
sharp image
fine powder
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
JP15942878A
Other languages
Japanese (ja)
Inventor
Kazunori Tawara
Takafumi Aoyama
Toshio Kumakura
Takashi Hayano
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 JP15942878A priority Critical patent/JPS5526588A/en
Publication of JPS5526588A publication Critical patent/JPS5526588A/en
Pending legal-status Critical Current

Links

Landscapes

  • Developing Agents For Electrophotography (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE: To control electric resistance of a toner and to enhance fluidity in order to form a sharp image, by firmly fixing magnetite fine powder to the surface of toner containing magnetic particles by heat softening.
CONSTITUTION: A single component type magnetic toner of particle diameter 0.5W 100μm prepared for use in a magnetic brush method is heat treated, with 0.1W 15wt%. of magnetite fine powder mixed in advance, for a short time at 100 to 260°C to firmly attach the magnetite powder on the partial or whole surface of each toner particle. Attachment of 0.5W4wt%. of magnetite powder provides a toner suitable for a plain paper copier method, while in a coated paper copier, attachment of above 4wt%. permits formation of a sharp image, but somewhat deteriorating fixability in the case of addition above 15wt%.
COPYRIGHT: (C)1980,JPO&Japio
JP15942878A 1978-12-25 1978-12-25 Preparation of magnetic toner Pending JPS5526588A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15942878A JPS5526588A (en) 1978-12-25 1978-12-25 Preparation of magnetic toner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15942878A JPS5526588A (en) 1978-12-25 1978-12-25 Preparation of magnetic toner

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP11464077A Division JPS5448241A (en) 1977-09-26 1977-09-26 Magnetic toner

Publications (1)

Publication Number Publication Date
JPS5526588A true JPS5526588A (en) 1980-02-26

Family

ID=15693520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15942878A Pending JPS5526588A (en) 1978-12-25 1978-12-25 Preparation of magnetic toner

Country Status (1)

Country Link
JP (1) JPS5526588A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62258472A (en) * 1986-05-01 1987-11-10 Sharp Corp Developer for electrostatic copying machine
JPS632075A (en) * 1986-01-13 1988-01-07 Konica Corp Toner for developing electrostatic image having improved characteristic
JPS6442660A (en) * 1987-08-07 1989-02-14 Hosokawa Micron Kk Method and device for producing toner
JPS6491143A (en) * 1987-10-02 1989-04-10 Konishiroku Photo Ind Electrostatic image developing toner

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS632075A (en) * 1986-01-13 1988-01-07 Konica Corp Toner for developing electrostatic image having improved characteristic
JPS62258472A (en) * 1986-05-01 1987-11-10 Sharp Corp Developer for electrostatic copying machine
JPS6442660A (en) * 1987-08-07 1989-02-14 Hosokawa Micron Kk Method and device for producing toner
JPS6491143A (en) * 1987-10-02 1989-04-10 Konishiroku Photo Ind Electrostatic image developing toner

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