US 12,393,132 B2
Green toner for electrostatic charge image development, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming method
Asafumi Fujita, Kanagawa (JP); Tomoaki Tanaka, Kanagawa (JP); Kotaro Yoshihara, Kanagawa (JP); and Tsuyoshi Murakami, Kanagawa (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Apr. 19, 2024, as Appl. No. 18/640,561.
Claims priority of application No. 2023-193886 (JP), filed on Nov. 4, 2023.
Prior Publication US 2025/0147443 A1, May 8, 2025
Int. Cl. G03G 9/09 (2006.01); G03G 9/097 (2006.01); G03G 15/08 (2006.01); G03G 15/20 (2006.01)
CPC G03G 9/09 (2013.01) [G03G 9/09725 (2013.01); G03G 15/0868 (2013.01); G03G 15/2014 (2013.01); G03G 2215/066 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A green toner for electrostatic charge image development, comprising:
green toner particles containing a binder resin, an azomethine fluorescent pigment having an emission peak in a wavelength region of 500 nm or more and 550 nm or less in an emission spectrum, and a non-fluorescent pigment having a reflection peak in a wavelength region of 480 nm or more and 540 nm or less in a reflection spectrum, wherein a mass proportion of the azomethine fluorescent pigment in the green toner particles is 3% by mass or more and 10% by mass or less and a mass ratio M1/M2 of a content M1 of the azomethine fluorescent pigment to a content M2 of the non-fluorescent pigment is 1 or more and 5 or less; and
oil-treated silica particles externally added to the green toner particles.