Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1990-12-07
1993-11-30
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
G03G 9097
Patent
active
052664333
ABSTRACT:
A two-component developer for electrophotography includes a toner comprising toner particles and an external additive composed of a compound of imidazole series or an imidazole derivative. The external additive has a volume median particle size below that of the toner particles, or of 0.1 to 100 .mu.m. The amount of external additive is 0.001 to 5% by weight based on the weight of the toner particles. As a result, scattering of toner may be prevented and the formation of fog in the background may be reduced. In addition, the electrostatic charge characteristics of the toner may be improved and the electrostatic charge rises in a satisfactory manner.
REFERENCES:
patent: 4355886 (1982-10-01), Perez et al.
patent: 4912006 (1990-03-01), Breitschaft et al.
patent: 4983485 (1991-01-01), Nagaoka et al.
Hatano Shintaro
Ishida Toshihisa
Nakamura Tadashi
Nakano Nobuhiko
Okamoto Kanshiro
Colin David G.
Corless Peter F.
Martin Roland
Sharp Kabushiki Kaisha
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