Toner powder for electrostatic images

Details Toner powder for electrostatic images Toner powder for electrostatic images

1974-10-16

1976-10-12

Whitby, Edward G.

Gas separation: apparatus

Magnetic separating means

252 621P, 427 14, G03G 908

Patent

active

039855597

ABSTRACT:
Toner powders for developing electrostatic images are provided with improved control of the polarity and the color of the particles by forming them of thermoplastic resin containing in dissolved state therein a normal salt of an organic basic dye, e.g. a Safranine dye, and an organic acid, e.g. a phenoxy acetic acid, having at least 6 carbon atoms and having a dissociation constant less then 4 as measured in water at 25.degree.C.

REFERENCES:
patent: 3236639 (1966-02-01), Tomanek
patent: 3647696 (1972-03-01), Olson

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