Abstract: According to one embodiment, there is provided an image forming apparatus including a derivation unit that derives remaining amount information on a remaining amount of a recording agent in a recording agent cartridge based on a physical quantity acquired by an operation acquisition unit, characteristic information acquired by a characteristic acquisition unit, and a recording agent amount acquired by a recording agent amount acquisition unit.

Abstract: An object of the embodiments herein is to provide a toner having excellent visibility upon irradiation with UV light, a toner cartridge, and an image forming apparatus. According to one embodiment, a toner contains at least two or more fluorescent coloring agents selected from the group consisting of a first fluorescent coloring agent, a second fluorescent coloring agent, and a third fluorescent coloring agent, and a binder resin. The first fluorescent coloring agent has a fluorescence peak in a wavelength region of 400 nm or more and less than 500 nm. The second fluorescent coloring agent has a fluorescence peak in a wavelength region of 500 nm or more and less than 600 nm. The third fluorescent coloring agent has a fluorescence peak in a wavelength region of 600 nm or more and less than 650 nm.

Abstract: An object of the embodiments herein is to provide a toner having excellent visibility upon irradiation with UV light, a toner cartridge, and an image forming apparatus. According to one embodiment, a toner contains at least two or more fluorescent coloring agents selected from the group consisting of a first fluorescent coloring agent, a second fluorescent coloring agent, and a third fluorescent coloring agent, and a binder resin. The first fluorescent coloring agent has a fluorescence peak in a wavelength region of 400 nm or more and less than 500 nm. The second fluorescent coloring agent has a fluorescence peak in a wavelength region of 500 nm or more and less than 600 nm. The third fluorescent coloring agent has a fluorescence peak in a wavelength region of 600 nm or more and less than 650 nm.

Abstract: According to embodiments, there are provided a toner having excellent color reproducibility, light resistance, coloring power, low-temperature fixability, storage stability, and long life property, a method for producing the same, a toner cartridge, and an image forming apparatus. A toner according to an embodiment includes toner particles containing a coloring agent, a binder resin, and a specific ester wax. The coloring agent contains at least one pigment (X) selected from C.I. Pigment Red 48, C.I. Pigment Red 48:1, C.I. Pigment Red 48:2, C.I. Pigment Red 48:3, C.I. Pigment Red 48:4, and C.I. Pigment Red 48:5, and C.I. Pigment Red 122 (Y), and the mass ratio of the component (X) to the component (Y) is as follows: X:Y=30:70 to 60:40.

Abstract: An object to be achieved by embodiments is to provide a toner having excellent color reproducibility, light resistance, coloring power, low-temperature fixability, storage stability, and long life property, a method for producing the same, a toner cartridge, and an image forming apparatus. A toner according to an embodiment includes toner particles containing a coloring agent, a binder resin, and a specific ester wax. The coloring agent contains at least one pigment (X) selected from C.I. Pigment Red 48, C.I. Pigment Red 48:1, C.I. Pigment Red 48:2, C.I. Pigment Red 48:3, C.I. Pigment Red 48:4, and C.I. Pigment Red 48:5, and C.I. Pigment Red 122 (Y), and the mass ratio of the component (X) to the component (Y) is from 30:70 to 60:40.

Abstract: An object to be achieved by embodiments is to provide a toner having excellent color reproducibility, light resistance, coloring power, low-temperature fixability, storage stability, and long life property, a method for producing the same, a toner cartridge, and an image forming apparatus. A toner according to an embodiment includes toner particles containing a coloring agent, a binder resin, and a specific ester wax. The coloring agent contains at least one pigment (X) selected from C.I. Pigment Red 48, C.I. Pigment Red 48:1, C.I. Pigment Red 48:2, C.I. Pigment Red 48:3, C.I. Pigment Red 48:4, and C.I. Pigment Red 48:5, and C.I. Pigment Red 122 (Y), and the mass ratio of the component (X) to the component (Y) is from 30:70 to 60:40.

Abstract: According to embodiments, there are provided a toner having excellent color reproducibility, light resistance, coloring power, low-temperature fixability, storage stability, and long life property, a method for producing the same, a toner cartridge, and an image forming apparatus. A toner according to an embodiment includes toner particles containing a coloring agent, a binder resin, and a specific ester wax. The coloring agent contains at least one pigment (X) selected from C.I. Pigment Red 48, C.I. Pigment Red 48:1, C.I. Pigment Red 48:2, C.I. Pigment Red 48:3, C.I. Pigment Red 48:4, and C.I. Pigment Red 48:5, and C.I. Pigment Red 122 (Y), and the mass ratio of the component (X) to the component (Y) is as follows: X:Y=30:70 to 60:40.

Abstract: An object to be achieved by embodiments is to provide a toner having excellent color reproducibility, light resistance, low-temperature fixability, storage stability, and long life property, a method for producing the same, a toner cartridge, and an image forming apparatus. A toner according to an embodiment includes toner particles containing a coloring agent, a binder resin, and a specific ester wax. The coloring agent contains C.I. Pigment Yellow 185.

Abstract: An object to be achieved by embodiments is to provide a toner having excellent color reproducibility, light resistance, low-temperature fixability, storage stability, and long life property, a method for producing the same, a toner cartridge, and an image forming apparatus. A toner according to an embodiment includes toner particles containing a coloring agent, a binder resin, and a specific ester wax. The coloring agent contains C.I. Pigment Yellow 185.

Abstract: An electrophotographic toner according to an embodiment includes toner particles, which contain a coloring material containing C.I. Pigment Red 48 and C.I. Pigment Red 122 at a weight ratio of from 30:70 to 80:20, a binder resin containing an amorphous polyester resin and a crystalline polyester resin, a wax, and a charge control agent, and which have a glass transition point (Tg) of from 30 to 45° C. and an acid value of from 10 to 17 mgKOH/g.

Abstract: A developer to be used in an image forming apparatus includes a toner containing a core toner including a colorant, a binder resin, a release agent and a charge controlling agent containing Al and Mg, a first inorganic oxide externally added to the core toner, having a primary particle diameter of from 51 to 200 nm in an amount of from 0.2 to 5.0 wt % based on the core toner, and a second inorganic oxide externally added to the core toner, having a primary particle diameter of from 8 to 50 nm in an amount of from 0.2 to 4.0 wt % based on the core toner, and a carrier having a volume resistivity under an electric field of 1000 V/mm of from 1×10+5 to 1×10+12 ?cm.

Abstract: A yellow toner, a magenta toner and a cyan toner, which are used for forming a color image, each contain a yellow pigment having an average dispersed diameter dy, a magenta pigment having an average dispersed diameter dm and a cyan pigment having an average dispersed diameter dc, respectively, and dm, dy and dc satisfy relationship dm>dy>dc.