Black toner including a kesinous component for forming an image

Details Black toner including a kesinous component for forming an image Black toner including a kesinous component for forming an image

1993-11-09

1995-07-04

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

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

To produce color reproduction

430106, G03G 908

Patent

active

054298989

ABSTRACT:
A method for forming an image with a copying machine capable of both color copying and black-and-white copying is disclosed, in which a black toner contains at least a colorant and a resinous component having a weight average molecular weight (Mw) of from 25,000 to 80,000 and a number average molecular weight (Mn) of from 2,000 to 8,000, with a Mw/Mn ratio being not less than 10, and having an apparent melt viscosity of 1.times.10.sup.4 poise at a temperature between 115.degree. C. and 140.degree. C. as measured by a flow tester method, and the quantity of heat of fixing is varied between a B/W mode and a color mode.

REFERENCES:
patent: 5306589 (1994-04-01), Yamamoto et al.
patent: 5310812 (1994-05-01), Yasuda et al.
patent: 5312704 (1994-05-01), Fuller et al.

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