Claims
- 1. An image forming method whereby a single-component type developer is employed to transfer a sharp image to plain paper comprising the steps of:
- providing a developer comprising ferromagnetic and insulating toner particles and free of carrier particles, and having a volume specific resistance of at least 10.sup.14 .OMEGA.cm and a potential decay ratio of less than 50% when measured by
- (1) forming on zinc oxide photoconductive material a layer of the developer of a predetermined thickness,
- (2) erasing the electrostatic latent image on said photoconductive material which served to form said layer, so as to reveal the potentials of said layer,
- (3) measuring the potentials V.sub.1 and V.sub.2 of said layer after one minute from dark decay and after three minutes from the succeeding light decay, respectively, and
- (4) determining the decay ratio on the basis of (V.sub.1 -V.sub.2)/V.sub.1 .times.100(%);
- electrostatically charging said toner particles;
- contacting said charged toner particles with photoconductive material on which an electrostatic latent image is provided in order to develop said latent image;
- and transferring the developed image onto plain paper.
- 2. A method according to claim 1, wherein said toner particles are charged by effecting mutual friction between said toner particles.
REFERENCE TO RELATED CO-PENDING APPLICATIONS
This application is a continuation application from U.S. patent application Ser. No. 025,783 filed Apr. 2, 1979 and which issued as U.S. Pat. No. 4,295,427 on Mar. 31, 1981, and which in turn is a continuation application from U.S patent application Ser. No. 829,795, filed Sept. 1, 1977, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3645770 |
Flint |
Feb 1972 |
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Continuations (2)
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Number |
Date |
Country |
Parent |
25783 |
Apr 1979 |
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Parent |
829795 |
Sep 1977 |
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