JPS5621138A - Two-color copying method - Google Patents
Two-color copying methodInfo
- Publication number
- JPS5621138A JPS5621138A JP9709479A JP9709479A JPS5621138A JP S5621138 A JPS5621138 A JP S5621138A JP 9709479 A JP9709479 A JP 9709479A JP 9709479 A JP9709479 A JP 9709479A JP S5621138 A JPS5621138 A JP S5621138A
- Authority
- JP
- Japan
- Prior art keywords
- red
- image
- photoreceptor
- black
- illumination
- 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
Landscapes
- Photoreceptors In Electrophotography (AREA)
- Light Receiving Elements (AREA)
Abstract
PURPOSE: To enhance image quality of a red and black copied image in 2-color copying method using a specified laminate type photoreceptor, by setting to a specified value an illumination quantity of the red light to be used in primary charging.
CONSTITUTION: First photoconductive layer 11, such as Se or Se alloy, interlayer 12, and second photoconductive layer 13 consisting of a eutectic complex of a thiapyrylium salt and a polycarbonate resin are laminated on conductive substrate 10 to form photoreceptor 1, which is subjected to positive primary charging together with uniform exposure to a red light, followed by negative secondary charging lower in potential than the primary charging and subsequent exposure to a light image of a red and black 2-color original. The surface potential of photoreceptor 1 becomes zero, positive, and negative in the areas corresponding to each of the white ground, the red image, and the black image, and photoreceptor 1 is developed with positively charged black toner TBL and negatively charged red toner TR. In said 2-color copying method, a light of its wavelength ≥560nm is used as said red light used for illumination in the primary charging, and this illumination is carried out in 150W 650μWsec/cm2 range illumination intensity.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9709479A JPS5621138A (en) | 1979-07-30 | 1979-07-30 | Two-color copying method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9709479A JPS5621138A (en) | 1979-07-30 | 1979-07-30 | Two-color copying method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5621138A true JPS5621138A (en) | 1981-02-27 |
JPS6248229B2 JPS6248229B2 (en) | 1987-10-13 |
Family
ID=14183042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9709479A Granted JPS5621138A (en) | 1979-07-30 | 1979-07-30 | Two-color copying method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5621138A (en) |
-
1979
- 1979-07-30 JP JP9709479A patent/JPS5621138A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6248229B2 (en) | 1987-10-13 |
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