JPS642065A - Liquid color developer for electrostatic photography - Google Patents
Liquid color developer for electrostatic photographyInfo
- Publication number
- JPS642065A JPS642065A JP15660687A JP15660687A JPS642065A JP S642065 A JPS642065 A JP S642065A JP 15660687 A JP15660687 A JP 15660687A JP 15660687 A JP15660687 A JP 15660687A JP S642065 A JPS642065 A JP S642065A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- electrostatic photography
- color developer
- naphthol
- enhanced
- 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
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
- G03G9/12—Developers with toner particles in liquid developer mixtures
- G03G9/122—Developers with toner particles in liquid developer mixtures characterised by the colouring agents
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Liquid Developers In Electrophotography (AREA)
Abstract
PURPOSE:To eliminate background fog and to obtain high image density by using a naphthol AS type insoluble azo pigment specified in composition. CONSTITUTION:The liquid color developer for electrostatic photography is obtained by dispersing into a liquid medium a toner composed essentially of a binder resin and the naphthol AS type insoluble azo pigment represented by formula I in which R is H or a group of formula II; each of A, B, and C is groups of formulae III, and each of X and Y is groups of formulae IV, thus permitting the characters printed by using this liquid developer to be freed of background fog and enhanced in image density, and accordingly, color images formed by color superimposing development to be enhanced in contrast.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15660687A JPS642065A (en) | 1987-06-25 | 1987-06-25 | Liquid color developer for electrostatic photography |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15660687A JPS642065A (en) | 1987-06-25 | 1987-06-25 | Liquid color developer for electrostatic photography |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH012065A JPH012065A (en) | 1989-01-06 |
JPS642065A true JPS642065A (en) | 1989-01-06 |
Family
ID=15631414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15660687A Pending JPS642065A (en) | 1987-06-25 | 1987-06-25 | Liquid color developer for electrostatic photography |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS642065A (en) |
-
1987
- 1987-06-25 JP JP15660687A patent/JPS642065A/en active Pending
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