JPS5555347A - Liquid developer for electrophotography - Google Patents
Liquid developer for electrophotographyInfo
- Publication number
- JPS5555347A JPS5555347A JP12934478A JP12934478A JPS5555347A JP S5555347 A JPS5555347 A JP S5555347A JP 12934478 A JP12934478 A JP 12934478A JP 12934478 A JP12934478 A JP 12934478A JP S5555347 A JPS5555347 A JP S5555347A
- Authority
- JP
- Japan
- Prior art keywords
- pigments
- toner
- hydroxides
- metals
- dispersed
- 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
- Liquid Developers In Electrophotography (AREA)
Abstract
PURPOSE: To improve the dispersion stability of the toner and improve developing characteristic and durability by using the carbon black or organic pigments covered with metal oxides on the coloring agent main components of the toner.
CONSTITUTION: Carbon black or organic pigments are dispersed in an aqueous solution of sulfates, hydroxides, etc. of metals and are made neutral or weak alkaline, whereby the soft core cellulated layers of hydroxides or hydrates of metals are formed around pigment particles. Next, these are gradually dried and solidified at 100W200°C, whereby the metal oxide coated pigments are obtained. These coated pigments are dispersed in an organic solvent (petroleum base aliphatic hydrocarbon, etc.) of high electric resistance and low dielectric factor to obtain the liquid developer. The coated pigments obtained in this way have good dispersibility and high resistance, prevent fining of the toner and become suited to provide the images of high density. The thickness of the oxide layer is suitably about 0.1W0.05μ and the amount is about 0.1W5wt% based on the weight of the pigments.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12934478A JPS585427B2 (en) | 1978-10-20 | 1978-10-20 | Liquid developer for electrophotography |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12934478A JPS585427B2 (en) | 1978-10-20 | 1978-10-20 | Liquid developer for electrophotography |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5555347A true JPS5555347A (en) | 1980-04-23 |
JPS585427B2 JPS585427B2 (en) | 1983-01-31 |
Family
ID=15007281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12934478A Expired JPS585427B2 (en) | 1978-10-20 | 1978-10-20 | Liquid developer for electrophotography |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS585427B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01156763A (en) * | 1987-11-25 | 1989-06-20 | E I Du Pont De Nemours & Co | Improved liquid electrostatic developer having scratch resistance of image |
JPH01257860A (en) * | 1988-04-07 | 1989-10-13 | Sony Corp | Liquid developer for developing electrostatic latent image |
-
1978
- 1978-10-20 JP JP12934478A patent/JPS585427B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01156763A (en) * | 1987-11-25 | 1989-06-20 | E I Du Pont De Nemours & Co | Improved liquid electrostatic developer having scratch resistance of image |
JPH01257860A (en) * | 1988-04-07 | 1989-10-13 | Sony Corp | Liquid developer for developing electrostatic latent image |
Also Published As
Publication number | Publication date |
---|---|
JPS585427B2 (en) | 1983-01-31 |
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