Abstract: An image forming apparatus of the present invention includes a latent electrostatic image bearing member, a latent electrostatic image forming unit configured to form a latent electrostatic image on the latent electrostatic image bearing member, at least three developing units each configured to develop the latent electrostatic image using a toner to form a visible image, a transferring unit configured to transfer the visible image on a recording medium, and an image fixing unit configured to the transferred image on the recording medium, in which the developing units respectively include any one of a yellow toner, a magenta toner, and a cyan toner, the magenta toner includes C.I. pigment red 269, and the yellow toner includes C.I pigment yellow 180 or C.I pigment yellow 155.

Abstract: A toner is provided that comprises a colorant and a binder resin, wherein the binder resin comprises a polyester resin that is prepared by a polycondensation reaction in the presence of at least a titanium-containing catalyst expressed by General Formula (II) or (II), the toner has a volume average particle diameter of 2.0 ?m to 10.0 ?m and a ratio Dv/Dn within a range of 1.00 to 1.

Abstract: The object is to provide a toner which can be smoothly replenished by a toner replenishing device using a powder pump even when the toner contains a releasing agent, and an image forming apparatus using the toner. There is provided a toner, which comprises a binder resin, a colorant and a releasing agent, has a dynamic friction coefficient of 0.15 to 0.35, and is replenished by the toner replenishing device having a powder pump configured to automatically supply the toner and a toner container arranged in conjunction with the powder pump so as to develop a latent electrostatic image on a image bearing member.

Abstract: A toner is provided including a mother toner including a crystalline polyester resin, an amorphous resin, and a wax, and an external additive in an amount of from 0.30 to 0.55 parts by weight based on 100 parts by weight of the mother toner. The toner satisfies the following equation 0.36?(2.77×C/R+1.97×W/R)/X?1.85, wherein each of C, W, and R represents a height of an absorbance peak specific to the crystalline polyester resin, the wax, and the amorphous resin, respectively, measured by a FT-IR ATR method, and X represents an amount (parts by weight) of the external additive. An image forming method and apparatus using the toner are also provided.

Abstract: An image forming apparatus producing images at a speed of from 500 to 1,700 mm/sec, including an image bearer; a charger; an irradiator; an image developer developing an electrostatic latent image with a developer including a toner including a binder resin and a colorant; a transferer; a cleaner; and a fixer, wherein the binder resin includes a crystalline polyester resin and an amorphous resin, wherein a peak ratio (W/R) of a specific peak height (W) of the crystalline polyester resin to a specific peak height (R) of the amorphous resin is from 0.050 to 0.555, and a toner transfer rate T (%) determined by the following formula (1) is from 75 to 100%: T(%)=(V?A)×100/V ??(1) wherein V represents a toner volume (mg/cm2) of the toner image on the image bearer; and A represents a toner volume (mg/cm2) thereof remaining on the image bearer after transfer.

Abstract: A developer contains a toner; and a carrier, wherein the toner contains toner particles containing a binder resin; and a colorant, and a titanium oxide as an external additive, wherein an amount of free titanium oxide particles released from the toner determined by a ultrasonic vibration method is from 5 to 22% by weight per total weight of the toner, and wherein the toner has a charge quantity distribution property so that a peak is present in a charge quantity range of from 20 to 40 ?C/g in absolute value, wherein the charge quantity distribution of the toner is determined by an increment method in which the developer including the toner is subjected to a blow off treatment to measure a charge quantity of the toner at 23° C. and 55% RH.

Abstract: A magenta color toner including toner particles including a binder resin including a polyester resin including an inorganic tin (II) compound; a colorant having one of naphthol compounds having one of specific formulae. A process cartridge in which includes a photoreceptor bearing an electrostatic latent image; and a developing device configured to develop the latent image with a developer including the magenta color toner to from a toner image on the photo receptor are unitized. An image forming apparatus including a photoreceptor; a charger configured to charge the photoreceptor; a light irradiator configured to irradiate the photoreceptor with imagewise light to form an electrostatic latent image; a developing device configured to develop the latent image with a developer including the magenta color toner to from a toner image on the photoreceptor; and a transfer device configured to transfer the toner image onto a receiving material.

Abstract: An image forming apparatus of the present invention includes a latent electrostatic image bearing member, a latent electrostatic image forming unit configured to form a latent electrostatic image on the latent electrostatic image bearing member, at least three developing units each configured to develop the latent electrostatic image using a toner to form a visible image, a transferring unit configured to transfer the visible image on a recording medium, and an image fixing unit configured to the transferred image on the recording medium, in which the developing units respectively include any one of a yellow toner, a magenta toner, and a cyan toner, the magenta toner includes C.I. pigment red 269, and the yellow toner includes C.I pigment yellow 180 or C.I pigment yellow 155.

Abstract: The object is to provide a toner which can be smoothly replrenished by a toner replenishing device using a powder pump even when the toner containes a releasing agent, and an image forming apparatus using the toner. There is provided a toner, which comprises a binder resin, a colorant and a releasing agent, has a dynamic friction coefficient of 0.15 to 0.35, and is replenished by the toner replenishing device having a powder pump configured to automatically supply the toner and a toner container arranged in conjuction with the powder pump so as to develop a latent electrostatic image on a image bearing member.

Abstract: A full color toner containing a binder resin, a release agent and a colorant is provided, wherein the binder resin contains a polyester resin containing a hybrid resin containing one or more vinyl group polymer units and one or more polyester units, and wherein the content A of the hybrid resin and the content B of the release agent satisfy the following relationship: B/2?A?3B.

Abstract: A toner including toner particles including a binder resin containing at least one polyester resin comprising an inorganic tin (II) compound and an external additive including a particulate inorganic material having a volume average particle diameter greater than 70 nm and less than 300 nm. The binder resin preferably includes a polyester resin having a weight average molecular weight of from 5,000 to 50,000 and another resin having a weight average molecular weight of from 200,000 to 400,000. A developer including the toner; and a developing device, an image forming apparatus and a process cartridge, which form toner images using the toner are also provided.