JPS5675660A - Liquid developer - Google Patents

Liquid developer

Info

Publication number
JPS5675660A
JPS5675660A JP15198279A JP15198279A JPS5675660A JP S5675660 A JPS5675660 A JP S5675660A JP 15198279 A JP15198279 A JP 15198279A JP 15198279 A JP15198279 A JP 15198279A JP S5675660 A JPS5675660 A JP S5675660A
Authority
JP
Japan
Prior art keywords
pigments
quinacridone
alkali metal
metal salt
liquid developer
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
JP15198279A
Other languages
Japanese (ja)
Inventor
Kazuo Nakamura
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP15198279A priority Critical patent/JPS5675660A/en
Publication of JPS5675660A publication Critical patent/JPS5675660A/en
Pending legal-status Critical Current

Links

Landscapes

  • Liquid Developers In Electrophotography (AREA)

Abstract

PURPOSE: To improve dispersibility of pigments, high-density image formation, etc. and eliminate the need for addition of any charge controlling agent, in a liquid developer for electrophotographic color copies etc., by keeping the weight ratio of rhodamine-base pigments and quinacridone-base pigments in a specific range.
CONSTITUTION: The toner contg. the rhodamine-base pigments expressed by the formula I [R1WR5 are H, alkyl of C1WC4, X- is anion of halogen, etc., B is halogen, sulfo (or its alkali metal salt), carboxy (or its alkali metal salt, alkyl ester), D is H, sulfo (or its alkali metal salt), n is 0 when B is -SO- 3 or -COO- and 1 at the other group] and the linear trans-quinacridone of β and α of the quinacridone-base pigments expressed by the formula II at 1:1W1:15 in the weight ratio thereof to the former pigments, is used for the liquid developer. In this way, the developer which is dispersed stably for a long period of time and is superior in chargeability, color tone and developing characteristic is obtainable.
COPYRIGHT: (C)1981,JPO&Japio
JP15198279A 1979-11-26 1979-11-26 Liquid developer Pending JPS5675660A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15198279A JPS5675660A (en) 1979-11-26 1979-11-26 Liquid developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15198279A JPS5675660A (en) 1979-11-26 1979-11-26 Liquid developer

Publications (1)

Publication Number Publication Date
JPS5675660A true JPS5675660A (en) 1981-06-22

Family

ID=15530468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15198279A Pending JPS5675660A (en) 1979-11-26 1979-11-26 Liquid developer

Country Status (1)

Country Link
JP (1) JPS5675660A (en)

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