JPS6432278A - Electrostatic copying method and liquid developer therefor - Google Patents
Electrostatic copying method and liquid developer thereforInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4890236A (en) * | 1972-02-29 | 1973-11-24 |
-
1987
- 1987-07-29 JP JP62187786A patent/JPS6432278A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4890236A (en) * | 1972-02-29 | 1973-11-24 |
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