JPS5538538A - Developing method in two color electrophotographic copying system - Google Patents
Developing method in two color electrophotographic copying systemInfo
- Publication number
- JPS5538538A JPS5538538A JP11153078A JP11153078A JPS5538538A JP S5538538 A JPS5538538 A JP S5538538A JP 11153078 A JP11153078 A JP 11153078A JP 11153078 A JP11153078 A JP 11153078A JP S5538538 A JPS5538538 A JP S5538538A
- Authority
- JP
- Japan
- Prior art keywords
- red color
- edge effect
- images
- charging
- color
- 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
Links
Abstract
PURPOSE: To eliminate edge effect in black color images and achieve higher quality by letting the developer used for development of red color images be of two component system and regulating the quantity of charging of the toner in this developer.
CONSTITUTION: In copying images of red and black 2 colors by a two color electrophotographic copying system, edge effect appears in the black color images and lowers image quality depending upon the value of the quantity of charging of red color toner. Namely, a red color edging is produced through a white ground part W around the black color images B on the two color copies. Thereupon, when the quantity of charging of the red color toner is changed, the edge effect decreases with an increase in said quantity and at above a certain value, no edge effect is produced at all any more. When it is increased further, the density of the red color visible images gradually decreases. Hence, no edge effect is produced and if such a charging region of the red color toner where the image density of the red color visible images is sufficient is selected and copying is done at the charging quantity of the red color toner within this range, the production of the edge effect may be prevented.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11153078A JPS5538538A (en) | 1978-09-11 | 1978-09-11 | Developing method in two color electrophotographic copying system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11153078A JPS5538538A (en) | 1978-09-11 | 1978-09-11 | Developing method in two color electrophotographic copying system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5538538A true JPS5538538A (en) | 1980-03-18 |
JPS6262349B2 JPS6262349B2 (en) | 1987-12-25 |
Family
ID=14563669
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11153078A Granted JPS5538538A (en) | 1978-09-11 | 1978-09-11 | Developing method in two color electrophotographic copying system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5538538A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5720744A (en) * | 1980-07-15 | 1982-02-03 | Hitachi Ltd | Method for dichromic electrophotography |
US4594302A (en) * | 1984-05-31 | 1986-06-10 | Mita Industrial Co., Ltd. | Developing process for two-colored electrophotography |
-
1978
- 1978-09-11 JP JP11153078A patent/JPS5538538A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5720744A (en) * | 1980-07-15 | 1982-02-03 | Hitachi Ltd | Method for dichromic electrophotography |
JPS6354184B2 (en) * | 1980-07-15 | 1988-10-27 | Hitachi Ltd | |
US4594302A (en) * | 1984-05-31 | 1986-06-10 | Mita Industrial Co., Ltd. | Developing process for two-colored electrophotography |
Also Published As
Publication number | Publication date |
---|---|
JPS6262349B2 (en) | 1987-12-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5583069A (en) | Non-impact printer | |
JPS5443026A (en) | Method and apparatus foe electrophotography | |
JPS5430043A (en) | Copier acting as facsimile | |
JPS5538538A (en) | Developing method in two color electrophotographic copying system | |
JPS55157755A (en) | Developing method | |
JPS56113160A (en) | Electrophotographic method | |
JPS5583070A (en) | Non-impact print method | |
JPS54155840A (en) | Developing method in two color electrophotographic copier | |
JPS5499631A (en) | Two color image forming method | |
JPS5557852A (en) | Overlap-forming method of electrostatic latent image | |
JPS53121623A (en) | Dichromatic electrophotographic copying method | |
JPS5417846A (en) | Dichromatic electrophotographic copying method | |
JPS5541437A (en) | Electrostatic copying method | |
JPS56113159A (en) | Electrophotographic method | |
JPS5557864A (en) | Developing method of electrophotography | |
JPS57100445A (en) | Image forming method of electrophotography | |
JPS5364529A (en) | Exposure method for color electrophotographic device | |
JPS5622436A (en) | Two color multisheet electrophotographic copying method | |
JPS54147040A (en) | Two color electrophotographic method | |
JPS5224531A (en) | Image formation method | |
JPS5683759A (en) | Two-color development method by one-component type magnetic toner | |
JPS54143139A (en) | Copying method for dichroic zerography | |
JPS56113161A (en) | Electrophotographic method | |
JPS57144568A (en) | Double-color electrophotographing method | |
JPS5339750A (en) | Electronic color photography |