Toner kit and color-image-forming method

Details Toner kit and color-image-forming method Toner kit and color-image-forming method

2006-04-18

2006-04-18

Toodrow, John L G (Department: 1756)

Radiation imagery chemistry: process, composition, or product th

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

To produce color reproduction

C430S107100, C430S110400, C430S126200

Reexamination Certificate

active

07029809

ABSTRACT:
In a toner kit having i) a non-magnetic black toner having at least carbon black and ii) color toners, the black toner has a weight-average particle diameter represented by D4band a one-point method BET specific surface area represented by Sb, and the color toners, other than the black toner, each have a weight-average particle diameter represented by D4cand a one-point method BET specific surface area represented by Sc, where the black toner and color toners satisfy the following relations (1) and (2):in-line-formulae description="In-line Formulae" end="lead"?0.60≦D4c/D4b≦0.96,  Relation (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.750≦Sc/Sb≦1.000;  Relation (2)in-line-formulae description="In-line Formulae" end="tail"?and each have an average circularity of from 0.950 to 1.000 and a circularity standard deviation of less than 0.040 as measured with a flow type particle image analyzer.

REFERENCES:
patent: 6316157 (2001-11-01), Yoshikawa et al.
patent: 6855469 (2005-02-01), Ikeda et al.

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