Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1996-12-03
1998-04-14
Goodrow, John
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430126, G03G 9097
Patent
active
057389667
ABSTRACT:
A negatively electrifiable, non-magnetic and single component developer comprising a binder resin, a carbon black and a charge control agent, wherein the carbon black has an average primary particle diameter of 20 to 50 nm and a pH of 2 to 5, and the charge control agent comprises a compound represented by the following formula: ##STR1## wherein M represents a metal atom selected from the group consisting of zinc, iron, nickel and cobalt, and R.sub.1 and R.sub.2 each represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. An image forming process using the developer is also disclosed. This one-component developer, which is suitable for use as a black toner in color image formation, can be stably charged and transported over long to give images free from fogging and having evenness of density and hardly poses problems such as dirts and color mixing over long.
REFERENCES:
patent: 4833059 (1989-05-01), Tomura et al.
patent: 5256514 (1993-10-01), Law et al.
patent: 5256515 (1993-10-01), Law et al.
Inoue Toyofumi
Okuno Hiroyoshi
Okuyama Hiroe
Torigoe Tetsu
Uchida Masahiro
Fuji 'Xerox Co., Ltd.
Goodrow John
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