Patent ID: 7422834
Filing Date: 2008-09-09
Classification: G03G

Abstract:
1. An electrostatic latent image developing magenta toner including a quinacridone pigment, a naphthol pigment, and a release agent, wherein colorant of the toner satisfies conditions (a) and (b) below: (a) an average primary particle size D50 of a quinacridone pigment represented by formula (1) and an average primary particle size D50 of a naphthol pigment represented by formula (2) are such that the average primary particle size D50 of the quinacridone pigment is smaller than the average primary particle size D50 of the naphthol pigment; and (b) the average primary particle size D50 of the quinacridone pigment is greater than 20 nm, and the average primary particle size D50 of the naphthol pigment is smaller than 200 nm; formula (1) being in which each of R 1 , R 2 , R 3 , and R 4 is selected from the group consisting of H, CH 3 , and Cl; R 1 and R 2 are different from each other; and R 3 and R 4 are different from each other; and formula (2) being