Claims
- 1. A method of developing an electrostatic latent image comprising;
- forming an electrostatic latent image with a negative polarity on an organic photoreceptor, and
- developing said electrostatic latent image with a toner bearing a positive electric charge, said toner comprising
- (a) a binder resin,
- (b) a coloring agent,
- (c) at least one oxide selected from the group consisting of hydrophobic aluminum oxide and hydrophobic titanium oxide,
- (d) silica, and
- (e) zinc stearate.
- 2. The method of claim 1, wherein said aluminum oxide and said titanium oxide are rendered hydrophobic by treatment with a compound selected from the group consisting of alkyl halogenated silane, alkyl alkoxy silane and alkylated silazane.
- 3. The method of claim 2, wherein said alkyl halogenated silane is dialkyl-di-halogenated silane, tri-alkyl-halogenated silane or alkyl-tri-halogenated silane; and said alkylated silazane is hexa-alkyl disilazane.
- 4. The method of claim 3, wherein said alkyl halogenated silane is dimethyl-dichlorosilane.
- 5. The method of claim 1, wherein said oxide has an average particle size of 0.001 .mu.m to 1 .mu.m.
- 6. The method of claim 5, wherein said average particle size is from 0.001 .mu.m to 1 .mu.m.
- 7. The method of claim 1, wherein said oxide comprises 0.01% to 10% by weight of said toner.
- 8. The method of claim 7, wherein said oxide comprises 0.05% to 5% by weight of said toner.
- 9. The method of claim 1, wherein said silica is a colloidal silica.
- 10. The method of claim 9, wherein said silica is a hydrophobic colloidal silica.
- 11. The method of claim 9, wherein said silica comprises 0.01% to 5% by weight of said toner.
- 12. The method of claim 11, wherein said silica comprises 0.5% to 2% by weight of said toner.
- 13. The method of claim 1, wherein said zinc stearate comprises 0.01% to 2% by weight of said toner.
- 14. A method of developing an electrostatic latent image comprising;
- forming an electrostatic latent image with a negative polarity on an organic photoreceptor, and
- developing said electrostatic latent image using a developer comprising magnetic carrier particles bearing a negative electric charge and consisting essentially of said magnetic particles and a fluorinated resin coated on said magnetic particles; and
- toner particles bearing a positive electric charge and containing
- (a) a binder resin,
- (b) a coloring agent,
- (c) at least one oxide selected from the group consisting of hydrophobic aluminum oxide and hydrophobic titanium oxide,
- (d) silica, and
- (e) zinc stearate.
- 15. The method of claim 14, wherein said oxide is rendered hydrophobic by treatment with a compound selected from the group consisting of alkyl halogenated silane, alkyl alkoxy silane and alkylated silazane.
- 16. The method of claim 15, wherein said alkyl halogenated silane is dialkyl-di-halogenated silane, tri-alkyl-halogenated silane or alkyl-tri-halogenated silane; and said alkylated silazane is hexa-alkyl disilazane.
- 17. The method of claim 16, wherein said alkyl halogenated silane is dimethyl-dichlorosilane.
- 18. The method of claim 14, wherein said oxide has an average particle size of 0.00l .mu.m to 1 .mu.m.
- 19. The method of claim 18, wherein said average particle size is 0.001 .mu.m to 1 .mu.m.
- 20. The method of claim 14, wherein said oxide comprises 0.01% to 10% by weight of said toner.
- 21. The method of claim 20, wherein said oxide comprises 0.05% to 5% by weight of said toner.
- 22. The method of claim 14, wherein said silica is a colloidal silica.
- 23. The method of claim 22, wherein said silica is a hydrophobic colloidal silica.
- 24. The method of claim 22, wherein said silica comprises 0.01% to 5% by weight of said toner.
- 25. The method of claim 23, wherein said silica comprises 0.05% to 2% by weight of said toner.
- 26. The method of claim 14, wherein said zinc stearate comprises 0.01% to 2% by weight of said toner.
Priority Claims (1)
Number |
Date |
Country |
Kind |
61-51330 |
Mar 1986 |
JPX |
|
Parent Case Info
This application is a Continuation of application Ser. No. 022,777, filed 03/06/87 now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
4600676 |
Terada et al. |
Jul 1986 |
|
4626487 |
Mitsohashi et al. |
Dec 1986 |
|
4652509 |
Shirose et al. |
Mar 1987 |
|
4737432 |
Tanaka et al. |
Apr 1988 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
22777 |
Mar 1987 |
|