JPS56162754A - Electrophotographic toner - Google Patents

Electrophotographic toner

Info

Publication number
JPS56162754A
JPS56162754A JP6543280A JP6543280A JPS56162754A JP S56162754 A JPS56162754 A JP S56162754A JP 6543280 A JP6543280 A JP 6543280A JP 6543280 A JP6543280 A JP 6543280A JP S56162754 A JPS56162754 A JP S56162754A
Authority
JP
Japan
Prior art keywords
toner
colorant
carbon black
surface active
active hydrogen
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
JP6543280A
Other languages
Japanese (ja)
Other versions
JPH0133822B2 (en
Inventor
Masafumi Kamiyama
Haruhiko Yano
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.)
Tomoegawa Co Ltd
Original Assignee
Tomoegawa Paper 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 Tomoegawa Paper Co Ltd filed Critical Tomoegawa Paper Co Ltd
Priority to JP6543280A priority Critical patent/JPS56162754A/en
Publication of JPS56162754A publication Critical patent/JPS56162754A/en
Publication of JPH0133822B2 publication Critical patent/JPH0133822B2/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
    • G03G9/09—Colouring agents for toner particles
    • G03G9/0902—Inorganic compounds
    • G03G9/0904—Carbon black

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE:To stabilize the charging quantity of a toner, improve the dispersibility, prevent whitening, etc. and increase the recording density by using carbon black having a specified surface active hydrogen content as a colorant for the toner. CONSTITUTION:Carbon black having 15.0X10<-5>-30.0X10<-5>mole/g surface active hydrogen (H of OH and COOH grous) content is used as a colorant for a toner consisting of resin and the colorant. The resulting toner has superior positively charging properties, contains uniformly dispersed carbon black, gives high-image density, and causes no white spot in a solid black part.
JP6543280A 1980-05-19 1980-05-19 Electrophotographic toner Granted JPS56162754A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6543280A JPS56162754A (en) 1980-05-19 1980-05-19 Electrophotographic toner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6543280A JPS56162754A (en) 1980-05-19 1980-05-19 Electrophotographic toner

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2214325A Division JPH03114060A (en) 1990-08-15 1990-08-15 Negatively chargeable toner for electrostatic photography

Publications (2)

Publication Number Publication Date
JPS56162754A true JPS56162754A (en) 1981-12-14
JPH0133822B2 JPH0133822B2 (en) 1989-07-14

Family

ID=13286932

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6543280A Granted JPS56162754A (en) 1980-05-19 1980-05-19 Electrophotographic toner

Country Status (1)

Country Link
JP (1) JPS56162754A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02219063A (en) * 1989-02-21 1990-08-31 Tomoegawa Paper Co Ltd Dry processing two-component developer for electrophotography

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS505052A (en) * 1973-04-12 1975-01-20
JPS5080137A (en) * 1973-11-02 1975-06-30

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS505052A (en) * 1973-04-12 1975-01-20
JPS5080137A (en) * 1973-11-02 1975-06-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02219063A (en) * 1989-02-21 1990-08-31 Tomoegawa Paper Co Ltd Dry processing two-component developer for electrophotography

Also Published As

Publication number Publication date
JPH0133822B2 (en) 1989-07-14

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