One-component magnetic dry developer comprises triiron tetroxide

Details One-component magnetic dry developer comprises triiron tetroxide One-component magnetic dry developer comprises triiron tetroxide

1982-06-02

1984-11-27

Welsh, John D.

Radiation imagery chemistry: process, composition, or product th

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

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

430903, 148105, 252 6253, G03G 914

Patent

active

044851634

ABSTRACT:
A one-component magnetic dry developer for use in development of positively charged images and transfer of developed images, comprises particles of a composition comprising a vinyl aromatic polymer, an aliphatic carboxylic acid having at least 14 carbon atoms, inclusive of the carbon atom of the carboxyl group, per carboxyl group or its metal salt and a finely divided magnetic material having a coercive force not larger than 120 Oe and a bulk density of at least 0.45 g/ml.
This magnetic developer provides an excellent transferred image having high image density and image sharpness on a plain paper as a transfer sheet without fogging or broadening of the contour of the image.

REFERENCES:
patent: 3510338 (1970-05-01), Varron
patent: 3577345 (1971-05-01), Jacknow
patent: 3645770 (1972-02-01), Flint

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