Magnetic toner having improved humidity dependency

Details Magnetic toner having improved humidity dependency Magnetic toner having improved humidity dependency

1983-03-22

1985-01-22

Martin, Roland E.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

430903, 428407, 252 6254, 252 6256, G03G 908, G03G 914

Patent

active

044952678

ABSTRACT:
Disclosed is a magnetic toner having an improved humidity dependency, which comprises as main ingredients a magnetic material composed of magnetite and a binder medium, wherein the water-soluble component content in the magnetite is lower than 0.15% by weight and the water content of the magnetite at a temperature of 20.degree. C. and a relative humidity of 60% is lower than 0.3% by weight.
If this magnetic toner is used for developing an electrostatically charged image, a sharp and clear copy having a high image density with no fogging can be obtained even under a high humidity condition.

REFERENCES:
patent: 3718594 (1973-02-01), Miller
patent: 4075391 (1978-02-01), Berg et al.

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