JPS5521081A - Preparation of colorant for wet type electrophotographic toner - Google Patents

Preparation of colorant for wet type electrophotographic toner

Info

Publication number
JPS5521081A
JPS5521081A JP9491478A JP9491478A JPS5521081A JP S5521081 A JPS5521081 A JP S5521081A JP 9491478 A JP9491478 A JP 9491478A JP 9491478 A JP9491478 A JP 9491478A JP S5521081 A JPS5521081 A JP S5521081A
Authority
JP
Japan
Prior art keywords
water
colorant
wet type
electrophotographic toner
type electrophotographic
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
JP9491478A
Other languages
Japanese (ja)
Other versions
JPS589417B2 (en
Inventor
Tsuneo Kurotori
Kazuo Tsubushi
Taro Kimura
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 JP53094914A priority Critical patent/JPS589417B2/en
Publication of JPS5521081A publication Critical patent/JPS5521081A/en
Publication of JPS589417B2 publication Critical patent/JPS589417B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Liquid Developers In Electrophotography (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE: To eliminate deterioration of image density and ground stain without requiring no troublesome measures in spite of using a resin soluble in a carrier fluid, by using a flashing method to coat an organic pigment and carbon black with a specified resin.
CONSTITUTION: An organic pigment and carbon black are kneaded in water, to form a water-containing paste. A solution of an aromatic or aliphatic hydrocarbon resin soluble in an aliphatic hydrocarbon of 1010ohm.cm or more resistivity and 3 or less relative dielectric constant, such as n-hexane with a solubility above 40% is kneaded with the above paste, and water and organic solvents, etc. are evaporated. The cake obtained is pulverized and thus, a colorant is prepared for wet type electrophotographic toner.
COPYRIGHT: (C)1980,JPO&Japio
JP53094914A 1978-08-03 1978-08-03 Manufacturing method of colorant for wet electrophotographic toner Expired JPS589417B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53094914A JPS589417B2 (en) 1978-08-03 1978-08-03 Manufacturing method of colorant for wet electrophotographic toner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53094914A JPS589417B2 (en) 1978-08-03 1978-08-03 Manufacturing method of colorant for wet electrophotographic toner

Publications (2)

Publication Number Publication Date
JPS5521081A true JPS5521081A (en) 1980-02-14
JPS589417B2 JPS589417B2 (en) 1983-02-21

Family

ID=14123260

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53094914A Expired JPS589417B2 (en) 1978-08-03 1978-08-03 Manufacturing method of colorant for wet electrophotographic toner

Country Status (1)

Country Link
JP (1) JPS589417B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57186758A (en) * 1981-05-13 1982-11-17 Ricoh Co Ltd Manufacture of colorant for electrostatic photographic toner
JPS57186759A (en) * 1981-05-13 1982-11-17 Ricoh Co Ltd Liquid developer for electrostatic photography

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5182626A (en) * 1974-12-28 1976-07-20 Ricoh Kk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5182626A (en) * 1974-12-28 1976-07-20 Ricoh Kk

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57186758A (en) * 1981-05-13 1982-11-17 Ricoh Co Ltd Manufacture of colorant for electrostatic photographic toner
JPS57186759A (en) * 1981-05-13 1982-11-17 Ricoh Co Ltd Liquid developer for electrostatic photography
JPH0315740B2 (en) * 1981-05-13 1991-03-01 Ricoh Kk
JPH0352624B2 (en) * 1981-05-13 1991-08-12 Ricoh Kk

Also Published As

Publication number Publication date
JPS589417B2 (en) 1983-02-21

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