JPS6432278A - Electrostatic copying method and liquid developer therefor - Google Patents

Electrostatic copying method and liquid developer therefor

Info

Publication number
JPS6432278A
JPS6432278A JP62187786A JP18778687A JPS6432278A JP S6432278 A JPS6432278 A JP S6432278A JP 62187786 A JP62187786 A JP 62187786A JP 18778687 A JP18778687 A JP 18778687A JP S6432278 A JPS6432278 A JP S6432278A
Authority
JP
Japan
Prior art keywords
developer
binder
coloring agent
replenishment
charge control
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
JP62187786A
Other languages
Japanese (ja)
Inventor
Ikuo Ota
Isato Momotake
Ryo Kohirumaki
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.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu Electric 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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP62187786A priority Critical patent/JPS6432278A/en
Priority to US07/217,767 priority patent/US4886730A/en
Priority to DE3825829A priority patent/DE3825829C2/en
Publication of JPS6432278A publication Critical patent/JPS6432278A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To extend a service life of a developer by replenishing a developer for replenishment whose composition is different from that of an initial developer, and adjusting the charging state of a coloring agent and a binder in the developer. CONSTITUTION:Electrostatic copying is executed by using a liquid developer formed by dispersing the coloring agent, the binder and the charge control agent, in a carrier solvent having non-polarity and a high insulating property. Also, as necessary the developer for replenishment whose composition is different from that of the initial developer is replenished, and copying is continued by holding the charging state of the coloring agent and the binder in the developer, within a desired range. For instance, by decreasing the quantity of the charge control agent in the developer for the replenishment, or changing its kind, the polarity of the coloring agent and the binder, which are varied by use is adjusted. In this regard, as for the charge control agent, gum rosin, calboxylic acid having a polar group in a molecule, or metallic soap, etc., can be used.
JP62187786A 1987-07-29 1987-07-29 Electrostatic copying method and liquid developer therefor Pending JPS6432278A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP62187786A JPS6432278A (en) 1987-07-29 1987-07-29 Electrostatic copying method and liquid developer therefor
US07/217,767 US4886730A (en) 1987-07-29 1988-07-11 Liquid developer for electrostatic photography
DE3825829A DE3825829C2 (en) 1987-07-29 1988-07-29 Liquid additive developer for electrostatic photography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62187786A JPS6432278A (en) 1987-07-29 1987-07-29 Electrostatic copying method and liquid developer therefor

Publications (1)

Publication Number Publication Date
JPS6432278A true JPS6432278A (en) 1989-02-02

Family

ID=16212200

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62187786A Pending JPS6432278A (en) 1987-07-29 1987-07-29 Electrostatic copying method and liquid developer therefor

Country Status (1)

Country Link
JP (1) JPS6432278A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4890236A (en) * 1972-02-29 1973-11-24

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4890236A (en) * 1972-02-29 1973-11-24

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