JPS5790644A - Developing method in two-color copying system - Google Patents

Developing method in two-color copying system

Info

Publication number
JPS5790644A
JPS5790644A JP55167295A JP16729580A JPS5790644A JP S5790644 A JPS5790644 A JP S5790644A JP 55167295 A JP55167295 A JP 55167295A JP 16729580 A JP16729580 A JP 16729580A JP S5790644 A JPS5790644 A JP S5790644A
Authority
JP
Japan
Prior art keywords
developing
average grain
grain sizes
carrier
sleeve
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
Application number
JP55167295A
Other languages
Japanese (ja)
Inventor
Fuyuhiko Matsumoto
Shuichi Tsushima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP55167295A priority Critical patent/JPS5790644A/en
Publication of JPS5790644A publication Critical patent/JPS5790644A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0105—Details of unit
    • G03G15/0126—Details of unit using a solid developer

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To improve image quality by making the electric resistance of sleeves in the 1st and 2nd developing devices dissimilar, and making the average grain sizes and volume electric resistivities of the developers used for the respective developing different from each other. CONSTITUTION:In the 1st developing device, the surface of a sleeve 40 is tufram- treated to have a higher resistance value, and a magnetic carrier having 10<8>OMEGAcm volume electric resistivity and 100mum average grain sizes is used as the magnetic carrier in a developer D4. On the other hand, a twill line sleeve of aluminum not applied with tufram surface treatment is used for a sleeve 50 in the 2nd developing device 5, and developing is carried out by using the carrier having 150mum average grain sizes and 10<4>OMEGAcm volume electric resistivity for the carrier in a developer D5, then the dropout phenomena in red color copied images are eliminated and the density of black color images is improved as well.
JP55167295A 1980-11-27 1980-11-27 Developing method in two-color copying system Pending JPS5790644A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55167295A JPS5790644A (en) 1980-11-27 1980-11-27 Developing method in two-color copying system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55167295A JPS5790644A (en) 1980-11-27 1980-11-27 Developing method in two-color copying system

Publications (1)

Publication Number Publication Date
JPS5790644A true JPS5790644A (en) 1982-06-05

Family

ID=15847098

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55167295A Pending JPS5790644A (en) 1980-11-27 1980-11-27 Developing method in two-color copying system

Country Status (1)

Country Link
JP (1) JPS5790644A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02213855A (en) * 1989-02-14 1990-08-24 Sharp Corp Full-color developer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02213855A (en) * 1989-02-14 1990-08-24 Sharp Corp Full-color developer

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