Process for developing latent electrostatic images with ink

Details Process for developing latent electrostatic images with ink Process for developing latent electrostatic images with ink

1975-09-24

1977-05-17

Hoffman, James R.

Coating processes

Measuring, testing, or indicating

Thickness or uniformity of thickness determined

96 1LY, 252 621L, G03G 912

Patent

active

040242927

ABSTRACT:
Liquid developer compositions for development of latent electrostatic images are disclosed. The electrostatic printing inks dry at ambient temperatures by penetration into paper leaving a continuous film having excellent rub resistance on the surface. The non-volatile, low viscosity inks comprise about 3-20% pigment and/or dye, about 5-35% of resinous particles having a size of 5 microns or less and having glass transition temperatures close to or below ambient temperature, said resinous particles being dispersed in the liquid carrier, 0-25% dispersing agent and about 25-90% non-volatile, high boiling organic liquid carrier and/or solvent.

REFERENCES:
patent: 3689260 (1972-09-01), Honjo et al.
patent: 3729418 (1973-04-01), Machida et al.
patent: 3753760 (1973-08-01), Kosel
patent: 3853554 (1974-12-01), Maki et al.
patent: 3907694 (1975-09-01), Lu

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