JPS57172349A - Electrophotographic dry development method - Google Patents
Electrophotographic dry development methodInfo
- Publication number
- JPS57172349A JPS57172349A JP56056962A JP5696281A JPS57172349A JP S57172349 A JPS57172349 A JP S57172349A JP 56056962 A JP56056962 A JP 56056962A JP 5696281 A JP5696281 A JP 5696281A JP S57172349 A JPS57172349 A JP S57172349A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- pts
- carrier
- hereafter
- carbon black
- 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
- G03G9/10—Developers with toner particles characterised by carrier particles
- G03G9/113—Developers with toner particles characterised by carrier particles having coatings applied thereto
- G03G9/1132—Macromolecular components of coatings
- G03G9/1133—Macromolecular components of coatings obtained by reactions only involving carbon-to-carbon unsaturated bonds
- G03G9/1134—Macromolecular components of coatings obtained by reactions only involving carbon-to-carbon unsaturated bonds containing fluorine atoms
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Dry Development In Electrophotography (AREA)
- Developing Agents For Electrophotography (AREA)
Abstract
PURPOSE:To obtain always a vivid image, by using a high chargeable toner as toners for copy start and initial supply and using a low charageable toner as a toner for supply hereafter in the developing method using a two-component developer containing a fluoropolymer coated carrier. CONSTITUTION:In a tw-component type developing method where a fluoro-polymer is coated on the surface of a carrier to prevent toner fine particles from sticking to the surface of the carrier, a high chargeable toner such as a toner consisting of 90wt.pts. styrene resin, 8wt.pts. carbon black, and 2wt.pts. nigrosine SB is used in the initial copy from the copy start to about 3,000 copies, and a low chargeable toner consisting of 85wt.pts. styrene resin and 15wt.pts. carbon black is supplied hereafter. Thus, a desired charge quantity is always kept, and vivid images are obtained even if copying is performed for a long time continously or intermittently.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56056962A JPS57172349A (en) | 1981-04-17 | 1981-04-17 | Electrophotographic dry development method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56056962A JPS57172349A (en) | 1981-04-17 | 1981-04-17 | Electrophotographic dry development method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57172349A true JPS57172349A (en) | 1982-10-23 |
Family
ID=13042155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56056962A Pending JPS57172349A (en) | 1981-04-17 | 1981-04-17 | Electrophotographic dry development method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57172349A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4614165A (en) * | 1985-11-25 | 1986-09-30 | Xerox Corporation | Extended life development system |
JPH0222667A (en) * | 1988-05-02 | 1990-01-25 | Xerox Corp | Holding of friction charge stability for electrophotographic developing agent |
JPH02198456A (en) * | 1989-01-27 | 1990-08-06 | Sharp Corp | Toner for electrophotography |
-
1981
- 1981-04-17 JP JP56056962A patent/JPS57172349A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4614165A (en) * | 1985-11-25 | 1986-09-30 | Xerox Corporation | Extended life development system |
JPH0222667A (en) * | 1988-05-02 | 1990-01-25 | Xerox Corp | Holding of friction charge stability for electrophotographic developing agent |
JPH02198456A (en) * | 1989-01-27 | 1990-08-06 | Sharp Corp | Toner for electrophotography |
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