Abstract: An electrostatic charge image developing toner includes toner particles containing a colorant, a binder resin, and a release agent and an external additive, in which the external additive contains inorganic particles which include saturated hydrocarbons having from 9 to 35 carbon atoms on the surfaces thereof.

Abstract: A toner is provided. The toner includes a crystalline resin and a non-crystalline resin, and has a thermal property such that when the toner is heated after being firstly heated to 60° C. followed by cooling in differential scanning calorimetry (DSC), the toner has a clear peak specific to melting of the crystalline resin at a temperature T1, and when the toner is heated after being firstly heated to 80° C. followed by cooling in the differential scanning calorimetry (DSC), the toner does not have a clear peak specific to melting of the crystalline resin at a temperature not higher than the temperature T1.

Abstract: A transparent electrostatic charge image developing toner includes a binder resin and a compound represented by the following Formula (1):

Abstract: A toner is prepared by wet granulation methods, including a monoester wax having carbon atoms of from 36 to 46 on average as a release agent. The toner has a DSC endothermic energy amount (?H1) originating from the wax of from 10 to 12 mJ/mg and a DSC endothermic energy amount (?H2) originating from the wax of from 0.6 to 0.9 times as much as ?H1 after a part of the wax is separated by hexane extraction from the toner. The hexane extraction includes mixing 1 g of the toner in 7 ml of n-hexane to prepare a mixture; stirring the mixture at 120 rpm for 1 min by a pot mill to prepare a dispersion; and subjecting the dispersion to suction filtration.

Abstract: A toner including: a binder resin; a releasing agent; and a colorant, wherein the binder resin contains a crystalline polyester resin and a non-crystalline polyester resin, wherein the releasing agent has an endothermic peak temperature of 60° C. to 80° C. at the second temperature rising in differential scanning calorimetry, and wherein the releasing agent is an ester wax which satisfies the following expressions (1) and (2): 1.1 Pa·s??*a?2.0 Pa·s . . . Expression (1) 0.001??*b/?*a?1.00 . . . Expression (2) where in Expressions (1) and (2), ?*a denotes a complex viscosity (Pa·s) determined by measuring a dynamic viscoelasticity of the releasing agent at a measurement frequency of 6.28 rad/s, and ?*b denotes a complex viscosity (Pa·s) determined by measuring a dynamic viscoelasticity of the releasing agent at a measurement frequency of 62.8 rad/s.

Abstract: An image is formed with an electrostatic latent image-developing toner that includes toner base particles and titanium oxide serving as an external additive. The toner base particles containing a binder resin, a colorant, and a charge control agent. The titanium oxide is attached to surfaces of the toner base particles and containing titanium oxide A and titanium oxide B. Each of the titanium oxide A and the titanium oxide B has a predetermined particle diameter and a predetermined volume resistivity. The liberation rate of each of the titanium oxide A and the titanium oxide B in the toner is within a predetermined range.

Abstract: An electrostatic charge image developing toner is configured of a polycondensate of a polyol and a polycarboxylic acid including a trimellitic acid, includes a polyester resin with an ethylenic unsaturated bond, and has toner particles including a reaction product of the polyester resin and a compound having an imidazoline structure in a surface part, a molar ratio of the trimellitic acid is from 0.1 mol % to 10 mol % with respect to the entire polymerization components of the polyester resin, and a weight ratio of the compound having an imidazoline structure is from 0.1% by weight to 10% by weight with respect to the total weight of the toner particles excluding the compound having an imidazoline structure.

Abstract: An external additive for toner that contains a resin particle and two or more kinds of particulates having different compositions present on the resin particle.

Abstract: Provided is an electrostatic charge image developer including a first toner that contains a binder resin and a brilliant pigment, a second toner that contains a binder resin without a brilliant pigment, and a carrier, wherein the developer satisfies the following formulae, 5 ?m?A?30 ?m??(1): 1 ?m?B?15 ?m??(2): 3.0?C/A?5.0??(3): 5.0?C/B?20.0??(4): wherein A represents a volume average particle size of the first toner, B represents a volume average particle size of the second toner, and C represents a volume average particle size of the carrier.

Abstract: A toner for developing an electrostatic charge image includes an aliphatic polyester resin and a polyester resin having a repeating unit derived from rosin diol.

Abstract: A polyester resin for a toner is a polycondensate of a carboxylic acid component and an alcohol component including rosin diol that is represented by the following formula (1) and has an alicyclic structure (alicyclic alcohol), wherein R1 and R2 each independently represents hydrogen or a methyl group, L1 represents a divalent linking group having an alicyclic structure, L2 and L3 each independently represents a divalent linking group selected from a group consisting of a carbonyl group, a carboxyl group, an ether group, a sulfonyl group, a chain-like alkylene group which may have a substituent, a cyclic alkylene group, a phenylene group, and combinations thereof, and A1 and A2 represent a rosin ester group, provided that a divalent linking group having the alicyclic structure represented by L1 may be a divalent linking group having an alicyclic structure formed through linking with any of R1, R2, L2 or L3.

Abstract: A polyester resin for a toner is a polycondensate of a dicarboxylic acid component and an alcohol component including rosin diol that is represented by the following formula (1), and has a weight average molecular weight (Mw) of from 40000 to 150000, and a molecular weight distribution (Mw/Mn) of from 12 to 25: wherein, R1 and R2 each independently represents hydrogen or a methyl group; L1, L2, and L3 each independently represents a divalent linking group selected from a group consisting of a carbonyl group, a carboxyl group, an ether group, a sulfonyl group, a chain-like alkylene group which may have a substituent, a cyclic alkylene group which may have a substituent, an arylene group which may have a substituent, and combinations thereof, and L1 and L2 or L1 and L3 may form a ring; and A1 and A2 represent a rosin ester group.

Abstract: Toner contains a mother toner particle containing a binder resin and a coloring agent and an external additive to cover the mother toner particle, wherein the external additive contains a resin particle, wherein the resin particle has an outer shell layer formed of silica or modified silica, wherein the resin particle has a non-spherical form with a shape factor (SF) of 1.

Abstract: An electrostatic-image developing toner contains an amorphous polyester resin that has repeating units having a backbone derived from dehydroabietic acid in a main chain thereof and that has a weight average molecular weight of about 30,000 to about 80,000; and at least one of a crystalline polyester resin containing a dicarboxylic acid (C10) and a diol (C9) as polymerization components and a crystalline polyester resin containing a dicarboxylic acid (C9) and a diol (C10) as polymerization components.

Abstract: A transparent electrostatic charge image developing toner includes a binder resin and a compound represented by the following Formula (1): wherein in Formula (1), R1 represents a methyl group or a trifluoromethyl group; R2 represents a hydrogen atom; R3 represents a methyl group, a trifluoromethyl group, a t-butyl group, a phenyl group, or a naphthyl group; and M represents a rare earth element.

Abstract: Provided is a polyester being a polymer including a dicarboxylic acid, a rosin diol, and an epoxy compound, the rosin diol being represented by general formula (1): wherein R1 and R2 are independently hydrogen or methyl; L1, L2, and L3 are independently a divalent linking group selected from the group consisting of carbonyl, ester, ether, sulfonyl, optionally substituted chain alkylenes, optionally substituted cyclic alkylenes, optionally substituted arylenes, and combinations thereof; L1 and L2 or L1 and L3 are optionally joined together to form a ring; and A1 and A2 are rosin ester groups.

Abstract: A toner for developing an electrostatic charge image includes toner particles obtained by dissolving or dispersing a binder resin and an additive in an organic solvent to prepare an oil phase component, and dispersing and granulating the oil phase component in an aqueous medium containing an inorganic dispersant dispersed therein. The binder resin is a polyester resin obtained from a material containing from 6.5 to 7.5 mol % of a long-chain alkyl group represented by a formula (1), the polyester resin having an acid value of from 4.9 to 7.

Abstract: An electrophotographic toner contains an electron donating color former compound, an electron accepting color developing agent, and a binder resin, wherein a toluene insoluble content in the electrophotographic toner is 10% by mass or more and 40% by mass or less, and the toner is decolorized by heating.

Abstract: A developing device includes: a developing frame having an opening; a developing roller that is arranged to the opening and is configured to carry developer; a supply roller configured to supply the developer to the developing roller, and a layer thickness regulation member configured to regulate a layer thickness of the developer carried on the developing roller. The developing frame includes: a developer accommodation chamber configured to accommodate the developer; a developer supply chamber configured to supply the developer, which is supplied from the developer accommodation chamber, to the supply roller; a developer return chamber that is arranged above the developer supply chamber and is configured to return the developer, which is scraped off by the layer thickness regulation member, to the developer accommodation chamber. The developer return chamber is provided with a developer returning unit configured to convey the developer to the developer accommodation chamber.

Abstract: An electrostatic image-developing toner comprising a binder resin, wherein the content of all the chlorine-substituted benzene derivatives in the electrostatic image-developing toner is about 0.01 ppb or more and about 10 ppb or less.

Abstract: Toner contains a binder resin, wherein the binder resin contains a block copolymer A containing a crystalline segment X and a non-crystalline segment Y, wherein the toner has a thermo-mechanical analysis (TMA) compressive deformation amount (TMA %) of 10% or less at 50° C. and a relative humidity of 90%, wherein the toner has a spin-spin relaxation time (t130) of 10 ms or greater at 130° C. as measured by pulse nuclear magnetic resonance (NMR), wherein the toner has a spin-spin relaxation time (t?70) of 1 ms or less at 70° C. as measured by pulse NMR when descending from 130° C. to 70° C.

Abstract: An electrostatic-image developing toner contains a polyester resin prepared by addition reaction of a polycondensate of a carboxylic acid component and an alcohol component with an isocyanate-containing compound. The polycondensate has an active hydrogen group. The alcohol component includes a rosin diol represented by general formula (1): (wherein R1 and R2 are each independently hydrogen or methyl; L1, L2, and L3 are each independently a divalent linking group selected from the group consisting of carbonyl, carboxyl, ether, sulfonyl, optionally substituted linear alkylenes, optionally substituted cyclic alkylenes, optionally substituted arylenes, and combinations thereof; L1 and L2 or L1 and L3 are optionally taken together to form a ring; and A1 and A2 are rosin ester groups).

Abstract: To provide a toner, which contains a colorant, a binder resin, and a releasing agent, wherein the toner satisfies the following (a) to (c); (a) the toner contains at least a polyester resin as the binder resin; (b) the toner has Tg1st of 25° C. to 50° C.; and (c) the toner has a TMA compressive deformation rate (TMA %) of 10% or lower at 50° C. under a condition having relative humidity of 70%, wherein the Tg1st is glass transition temperature of the toner for first heating, as the toner is measured by a DSC system (a differential scanning calorimeter).

Abstract: To provide an electrophotographic toner, which contains a crystalline resin, a non-crystalline resin, a colorant, and a releasing agent, wherein the toner has a storage elastic modulus of 5.0×104 Pa to 5.0×106 Pa at 80° C., and a storage elastic modulus of 2.0×102 Pa to 2.0×103 Pa at 140° C., and wherein the toner has a ratio (C)/((C)+(A)) of 0.10 or greater, where (C) is an integrated intensity of a diffraction spectrum derived from a crystalline structure, (A) is an integrated intensity of a diffraction spectrum derived from a non-crystalline structure, and the diffraction spectrum is a diffraction spectrum of the toner as measured by an X-ray diffraction spectrometer.

Abstract: A carrier for developing an electrostatic latent image of the present invention includes a core material and a coating layer which coats the core material, wherein the coating layer includes a resin and fine particles, wherein the coating layer has an average layer thickness difference of 0.02 ?m to 3.0 ?m, and wherein the carrier for developing an electrostatic latent image has an arithmetic mean surface roughness Ra1 of 0.5 ?m to 0.9 ?m.

Abstract: Provided are a developing unit alleviating fogging occurrence and an electrophotographic image forming apparatus providing images over long periods. The developing unit comprises at least toner (1), developing roller (2). (1) when a displacement amount when a load is applied at Y° C. and 9.8×10?5 N/sec to 2.94×10?4 N is X2(Y), a displacement amount when the toner is left to stand for 0.1 second is X3(Y), a displacement amount when the load is reduced at 9.8×10?5 N/sec to ON is X4(Y), and percentage of (X3(Y)?X4(Y)) to X3(Y) is Z(Y), 40?Z(25)?80 and 10?Z(50)?55 are satisfied; when a gradient from the origin to the maximum load in the load-displacement curve at 25° C. is R(25), 0.49×10?3?R(25)?1.70×10?3 is satisfied; the toner has glass transition temperature TgA (40° C.-60° C.) and maximum endothermic peak temperature P1 (70° C.-110° C.), 15° C.?(P1?TgA)?70° C. is satisfied. (2) developing roller comprises a surface layer containing a urethane resin having structure (a), and one or both structures (b)-(c).

Abstract: A toner, including: a crystalline resin containing a urethane bond, a urea bond, or both thereof; and a compound represented by the following General Formula (1), wherein an amount of the compound represented by the General Formula (1) is 0.01% by mass to 0.25% by mass: CnH2n+1R??General Formula (1) where n is 8 to 22 and R is COOH, NH2 or OH.

Abstract: A polyester resin for a toner containing: a repeating unit derived from a dicarboxylic acid component; and a repeating unit derived from a dial component represented by Formula (1): wherein each of R1 and R2 independently represents a hydrogen atom or a methyl group, each of L1, L2 and L3 independently represents a divalent linking group selected from the group consisting of carbonyl groups, ester groups, ether groups, sulfonyl groups, substituted or unsubstituted chained alkylene groups, substituted or unsubstituted cyclic alkylene groups, substituted or unsubstituted arylene groups, and combinations thereof, L1 and L2 or L1 and L3 optionally forms a ring, each of A1 and A2 independently represents a rosin ester group, and the acid value is from 3 mgKOH/g to 30 mgKOH/g.

Abstract: An electrostatic image developing toner including: toner base particles each including a binder resin and a colorant; and an external additive, wherein the toner base particles each have protrusions on a surface thereof, an average of lengths of long sides of the protrusions is 0.1 ?m or more but less than 0.5 ?m, a standard deviation of the lengths of the long sides of the protrusions is 0.2 or less, a coverage rate of the protrusions on the surface of each toner base particle is 10% to 90%, and the external additive includes an external additive (A) which is fine inorganic particles each containing silicone oil.

Abstract: Toner contains a binder resin containing a crystalline resin having a urethane and/or urea bonding; and a colorant, wherein in a diffraction spectrum of the toner as measured by an X-ray diffraction instrument, a ratio {C/(C+A)} of an integral intensity C of the spectrum derived from the crystalline structure to an integral intensity A of the spectrum derived from the non-crystalline structure is 0.12 or greater, wherein the toner satisfies the following relation 1: T1?T2?30° C. (Relation 1), where T1 represents the maximum endothermic peak in the first temperature rising from 0° C. to 100° C. at the temperature rising rate of 10° C./min and T2 represents the maximum exothermic peak in the first temperature falling from 100° C. to 0° C. at the temperature falling rate of 10° C./min as T1 and T2 are measured by diffraction scanning calorimetry (DSC).

Abstract: An electrostatic image developing toner includes (A) an amorphous polyester resin containing at least a repeating unit derived from a dicarboxylic acid component and a repeating unit derived from a dialcohol component represented by the specific formula, and (B) an amorphous polyester resin differing in the weight average molecular weight from the amorphous polyester resin (A), wherein the difference (absolute value) in the weight average molecular weight between the amorphous polyester resin (A) and the amorphous polyester resin (B) is from about 30,000 to about 100,000.

Abstract: Provided is a brilliant toner containing a brilliant metallic pigment of which the surface is covered with at least one kind of metal oxides selected from a group consisting of silica, alumina, and titania, wherein the brilliant toner has a dielectric loss factor of from 10×10?3 to 60×10?3.

Abstract: A toner including: toner particles each including a toner base particle and an external additive attached thereon, where the toner base particle includes a binder resin and a colorant, wherein the toner base particles each have protrusions on a surface thereof, an average of lengths of long sides of the protrusions is 0.10 ?m or more but less than 0.50 ?m, a standard deviation of the lengths of the long sides of the protrusions is 0.2 or less, a coverage rate of the protrusions on the surface of the toner base particle is 10% to 90%, and the external additive includes fine inorganic particles whose surfaces have been treated with an amino group-containing silane coupling agent.

Abstract: Toner prints with efficiently enhanced gamut are provided. In one aspect a toner print comprises a receiver and a toner image fused to the receiver. The toner image has a first area with a first density at a first hue angle formed by a first amount of a fluorescent toner colorant at the first area; and, a second area with a second density at the first hue angle formed by a second amount of the fluorescent toner color that is lower than the first amount of fluorescent toner colorant. The second density is greater than the first density.

Abstract: A toner for developing an electrostatic charge image includes a core layer including a first binder resin, a colorant and a releasing agent; and a shell layer coating the core layer and including a second binder resin. The first binder resin of the core layer includes a low molecular weight amorphous polyester resin having a weight-average molecular weight of about 6000 g/mol to about 20000 g/mol, a high molecular weight amorphous polyester resin having a weight-average molecular weight of about 25000 g/mol to about 100000 g/mol, and a crystalline polyester resin having a weight-average molecular weight of about 8000 g/mol to about 30000 g/mol. The second binder resin of the shell layer includes the low and high molecular weight amorphous polyester resins.

Abstract: Toner contains a binder resin and a colorant, wherein the binder resin contains a resin having a polyhydroxy carboxylic acid skeleton, wherein the toner has a half effusion temperature of from 80° C. to 120° C. as measured by a temperature rising method using a flow tester.

Abstract: An electrostatic charge image developing toner includes toner particles, and silica composite particles that contain silicon oxide and from 0.001% by weight to 10% by weight of titanium, and have an average particle size of from 30 nm to 500 nm, a particle size distribution index of from 1.10 to 1.50, and an average circularity of from 0.50 to 0.85.

Abstract: An image forming method including forming a toner image on a transfer medium with a toner comprising a wax having a polar group, and applying a varnish to the toner image. The wax may be a plant wax having an ester group, a wax having a polar group derived from a fatty acid, an oxidized wax, or a mixture thereof. The varnish may include a surfactant, such as a polyoxyethylene glycol, and may be photocurable.

Abstract: An electrostatic charge image developing toner includes: a polyester resin containing a graft copolymer, the graft copolymer being formed with a polyester skeleton as a main chain and block copolymers containing a styrene-based polymer block and a crystalline acrylate-based polymer block. The styrene-based polymer block is grafted onto the polyester skeleton.

Abstract: A polyester resin for a toner containing: a repeating unit derived from a dicarboxylic acid component; and a repeating unit derived from a diol component represented by Formula (1): wherein each of R1 and R2 independently represents a hydrogen atom or a methyl group, each of L1, L2 and L3 independently represents a divalent linking group selected from the group consisting of carbonyl groups, ester groups, ether groups, sulfonyl groups, substituted or unsubstituted chained alkylene groups, substituted or unsubstituted cyclic alkylene groups, substituted or unsubstituted arylene groups, and combinations thereof, L1 and L2 or L1 and L3 optionally forms a ring, and each of A1 and A2 independently represents a rosin ester group.

Abstract: An electrostatic image developing toner including: toner particles each containing binder resin and colorant; and an external additive supported on the toner particles, wherein the toner particles each have protrusions on surface thereof, average of lengths of long sides of the protrusions is 0.10 ?m or more but less than 0.50 ?m, standard deviation of the lengths of the long sides of the protrusions is 0.20 or less, coverage rate of the protrusions on the surface of each toner particle is 30% to 90%, the external additive includes at least two different particles including external additive (A) and one or more external additives (B), external additive (A) has longest average primary particle diameter among the external additives and charged to have the opposite polarity to the toner particles, and at least one of the external additives (B) is charged to have the same polarity as the toner particles.

Abstract: To provide a toner, which contains a binder resin, a colorant, and a silicone oil-treated external additive, wherein the silicone oil-treated external additive contains free silicone oil, and a total amount of the free silicone oil is 0.2% by mass to 0.5% by mass relative to the toner, and wherein the toner has the average circularity of 0.96 to 1.

Abstract: To provide a toner including a binder resin and a colorant, wherein the toner has a glass transition temperature by differential scanning calorimetry (DSC) of 20° C. or greater and less than 50° C., an endothermic peak temperature by DSC of 50° C. or greater and less than 80° C. and an amount of compressive deformation at 50° C. by a thermomechanical analysis of 5% or less.

Abstract: White toner contains a binder resin, a white pigment, and a releasing agent, wherein the white pigment is coated with the releasing agent and dispersed in the binder resin.

Abstract: Provided are a toner and a method of preparing the same. The toner includes a binder resin, a coloring agent, and at least one additive, and a storage modulus curve of the toner with respect to temperature has multiple inflection points. The toner may be used in an electrophotographic image forming apparatus.

Abstract: A brilliant toner includes toner particles which at least contain a brilliant pigment, a binder resin, and a release agent; and an external additive, wherein a ratio (X/Y) of a specific surface area X (m2/g), calculated from a projected image of the toner particles, to a BET specific surface area Y (m2/g) of the toner particles is from 0.3 to 1.0.

Abstract: To provide a toner, which contains: base particles each having a core-shell structure, where a core of the base particle contains crystalline polyester, non-crystalline polyester, a colorant, and a releasing agent, and a shell of the base particle contain a resin, wherein the toner has thermal hardness of 0.5 to 1.8, wherein the toner has a softening index of 80° C. to 95° C., and wherein the toner has thermal retentiveness of 30° C. to 50° C.

Abstract: A method of manufacturing resin particles uses a microreactor to mix first and second stock solutions, and to aggregate resin fine-particles to obtain resin particles. The microreactor includes stationary and rotating discs that are two discoid discs and that are disposed so that a gap is formed between circular surfaces of the two discs when the resin particles are manufactured, a first stock solution feed part that feeds the first stock solution from an end of the gap into the gap, and one or more second stock solution feed parts that are formed at the opposite side of the first stock solution feed part based on the center of the circular surface of the stationary disc by spatially connecting top and bottom surfaces of the stationary disc, and that feed the second stock solution containing an aggregating agent from the top surface side of the stationary disc to the gap.

Abstract: A developer cartridge assembled to a developing device defining therein a developing chamber. The developer cartridge includes a first accommodating portion, and a first agitator. The first accommodating portion accommodates therein a developing agent and is positioned beside the developing device. The first accommodating portion includes a first wall part neighboring the developing device. The first wall part is formed with a first through-hole and a second through-hole. The first through-hole is open diagonally downward from the first accommodating portion to the developing device. The second through-hole is open diagonally upward from the first accommodating portion to the developing device. The first through-hole and the second through-hole allow communication between an interior of the first accommodating portion and the developing chamber. The first agitator is rotatably disposed in the first accommodating portion and in sliding contact with the first wall part in a vertical direction.

Abstract: A toner set, including: at least one chromatic toner containing a colorant; and a transparent toner containing no colorant, wherein the chromatic toner and the transparent toner each include a releasing agent and a binder resin, and wherein an amount of a tetrahydrofuran insoluble matter in the transparent toner is smaller than an amount of a tetrahydrofuran insoluble matter in the chromatic toner.