Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1999-01-29
2000-10-03
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430102, 430111, G03G 1308
Patent
active
061270830
ABSTRACT:
A non-magnetic one-component development process is provided which comprises supplying a developer onto a photoreceptor using a non-magnetic one-component developing machine comprising at least a developer-supporting roll and a layer-forming blade so that an electrostatic latent image on said photoreceptor is developed, characterized in that as said developer there is used a spherically particulate toner having a volume-average particle diameter of from 1 to 6 .mu.m and the amount of said toner to be attached to said developer-supporting roll is from 0.1 mg/cm.sup.2 to 0.45 mg/cm.sup.2. In accordance with the process of the present invention, the image quality can be drastically improved while drastically reducing the consumed amount of the toner. In particular, by predetermining the colorant content in the spherically particulate toner to be used in the development process of the present invention to not less than 8% by weight, if the colorant is carbon black, or not less than 3% by weight, if the colorant is an organic pigment, the image quality can be further improved. Further, by optimizing the circularity, particle size distribution, added amount of inorganic material fine particles and other conditions of the spherically particulate toner, the image quality can be even further improved.
REFERENCES:
patent: 5328792 (1994-07-01), Shigemori et al.
patent: 5589313 (1996-12-01), Takezawa et al.
patent: 5620823 (1997-04-01), Kambayashi et al.
patent: 5688622 (1997-11-01), Ito et al.
Ito Takashi
Itoya Kazuo
Nomura Minoru
Takayanagi Hitoshi
Dainippon Ink and Chemicals Inc.
Martin Roland
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