Abstract: A liquid developer includes an insulating liquid and a plurality of toner particles. The plurality of toner particles has a median size not smaller than 1 ?m and not greater than 3 ?m as a whole. In the plurality of toner particles, average circularity is not smaller than 0.90 and not greater than 0.96, and a standard deviation of circularity is not smaller than 0.02 and not greater than 0.10.

Abstract: A liquid developer includes an insulating liquid and a plurality of toner particles. The plurality of toner particles has a volume-based median size not smaller than 0.5 ?m and not greater than 3 ?m as a whole, and a volume-based coefficient of variation not lower than 40% and not higher than 130%. The plurality of toner particles includes a first toner particle group of the toner particles having a particle size not greater than 1 ?m. The number of toner particles constituting the first toner particle group occupies not lower than 20% of the total number of toner particles. The toner particles in the first toner particle group have an average circularity not smaller than 0.945.

Abstract: Toner for developing an electrostatic latent image contains toner particles, the toner particles contain a resin and a pigment, the pigment includes a first pigment and a second pigment, the first pigment is carbon black, and the second pigment is C. I. Pigment Brown 23 and/or C. I. Pigment Brown 25.

Abstract: Toner for developing an electrostatic latent image contains toner particles, the toner particles contain a resin and a pigment, the pigment includes a first pigment, a second pigment, and a third pigment, the first pigment is carbon black, the second pigment is C.I. Pigment Brown 23 and/or C.I. Pigment Brown 25, and the third pigment is nigrosine.

Abstract: A liquid developer includes toner particles and an insulating liquid, the toner particles include a resin and a pigment, the resin includes a crystalline resin, the pigment includes a first pigment, a second pigment, and a third pigment, the first pigment is carbon black, the second pigment is C.I. Pigment Brown 23 and/or C.I. Pigment Brown 25, the third pigment is nigrosine, and 20 to 60% by mass of the pigment is included relative to the toner particles.

Abstract: A liquid developer is characterized in that it includes toner particles and an insulating liquid, the toner particles include a resin and a pigment, the pigment includes a first pigment and a second pigment, the first pigment is carbon black, the second pigment is C.I. Pigment Brown 23 and/or C.I. Pigment Brown 25, and 20 to 60% by mass of the pigment is included relative to the toner particles.

Abstract: A liquid developer is obtained by dispersing toner particles containing at least a resin and a coloring agent in an insulating liquid. The toner particles have a core-shell structure that first resin particles containing a first resin are attached to or cover surfaces of second resin particles containing a second resin. The coloring agent contains nigrosine. A content of nigrosine in the toner particles is not lower than 1 mass % and not higher than 20 mass %. The second resin satisfies Equations (1) to (2) below. In Equations (1) to (2), x represents a number average molecular weight of the second resin and y represents a urethane group concentration (mass %) in the second resin. ?0.00003x+2.03?y??0.00003x+6.

Abstract: A liquid developer of the present invention includes a toner particle and an insulating liquid, the toner particle including a resin and a pigment, the resin including a polyester resin, the pigment including a first pigment, a second pigment, and a third pigment, the first pigment being a carbon black, 10 to 25 mass % of the first pigment being included in the toner particle, the second pigment being nigrosine, 3 to 15 mass % of the second pigment being included in the toner particle, the third pigment being at least one organic pigment selected from a group consisting of a phthalocyanine blue pigment, a phthalocyanine green pigment, a carmine-based pigment, a naphthol-based pigment, a quinacridon-based pigment, an azo-based pigment, a benzimidazolone-based pigment, and an isoindoline-based pigment, 5 to 20 mass % of the third pigment being included in the toner particle.

Abstract: A liquid developer includes at least toner particles and an insulating liquid. The toner particles include a resin and a color material dispersed in the resin. 90 mass % or more of the insulating liquid is aliphatic saturated hydrocarbon having a carbon number of 11 to 16, and 20 to 60 mass % of the insulating liquid is aliphatic saturated hydrocarbon having a carbon number of 11 to 12.

Abstract: The present invention provides a developer for electrophotography which is superior in property of build up of electrification and in charge stability even in environments of high temperature and high humidity or in an environment of low temperature and low humidity where it is difficult for a developer to retain its electrostatic charge performance, and which can provide an image free from fogging and decrease in density for a long term, that is, a developer for electrophotography containing composite oxide particles which include metal titanate particles containing titanium as a first metal atom and a second metal atom and containing therein 0.009 to 0.350% by weight of a third metal atom selected from the group consisting of the metal atoms belonging to Group 5A of the long form of the periodic table of elements.

Abstract: A liquid developer used for wet-type image forming apparatuses includes toner particles and an insulating liquid, the toner particles include a resin, a pigment, and a pigment dispersant, the pigment includes a pigment having an acid group, and the pigment dispersant is a basic polymer dispersant including units derived from ?-caprolactone.

Abstract: Provided are a toner and a toner manufacturing method with which high image density and a broad range of color reproduction are obtained, and with which high-quality images are also obtained. The toner is composed of toner particles that comprise a binding resin containing a polyester resin and a colorant, and contains 10-1,500 ppm of a metal element selected from titanium, germanium, and aluminum, and a cyclic phenol sulfide represented by general formula (1) selected from thiacalixarene, sulfinyl thiacalixarene and sulfonyl thiacalixarene.

Abstract: A liquid developer includes at least toner particles and an insulating liquid. The toner particles include a resin and a color material dispersed in the resin. 90 mass % or more of the insulating liquid is aliphatic saturated hydrocarbon having a carbon number of 11 to 16, and 20 to 60 mass % of the insulating liquid is aliphatic saturated hydrocarbon having a carbon number of 11 to 12.

Abstract: A liquid developer includes toner particles, an insulating liquid, and a dispersant, and is characterized in that the toner particles includes a resin and a pigment dispersed in the resin, the resin includes a polyester resin, the dispersant includes a basic polymeric dispersant, and a solid obtained by drying the liquid developer has a melting point of at least 55° C.

Abstract: A toner comprising toner particles, wherein a surface-treated titanate compound is contained on the surface of parent toner particles comprising a resin and a colorant, and the titanate compound having a carbon amount of not less than 0.15% by mass and not more than 0.50% by mass.

Abstract: Disclosed is a toner which can be charged at a designated level even when a lot of print is carried out with severity of charging by stirring and when the printing is carried out under the low temperature-low humidity or the high temperature-high humidity condition. A toner comprising (a) a particle comprising a resin and a colorant; and (b) a titanate compound on the surface of the particle, in which the titanate compound contains iron in an amount of from 100 ppm to 1,000 ppm.

Abstract: A toner for developing an electrostatic latent image is disclosed, the toner being composed of toner particles which comprises toner mother particles containing a binding resin having a hydrophilic polar group, a coloring agent and a releasing agent, and an external additive, wherein a mass of Na atoms in a neighborhood of surface of the toner particles measured by the measuring method described below is 50 to 750?g in 1 g of toner particles. Measuring Method (a) Extracting Na atoms in the neighborhood of surface of the toner particles by stirring the toner particles and dilute hydrochloric acid, (b) Preparing sample for measurement by filtering the liquid extracting Na atoms, and (c) Measuring the mass of Na atoms in the sample via Induction Coupling Plasma Optical Emission Spectrometer.

Abstract: It is to provide a toner which can form an image of high image quality exhibiting high resolution wherein a final visible image exhibits high image density and high thin-line reproducibility even in long-term use. In a toner incorporating at least a colored particle containing a binder resin composed of a polyester resin and a colorant, and external additive particles, the toner has a degree of average circularity of 0.950-0.990, a volume based median diameter of 4.5-8.0 ?m, a volume based particle diameter dispersibility (CVVOL value) of 15-25; a metal selected from titanium, germanium, and aluminum is incorporated at a ratio of 10-1500 ppm; the above external additive particles is composed of a composite oxide incorporating a silicon atom and at least either of a titanium atom and an aluminum atom; and the existence ratio of silicon atoms in the surface thereof is higher than the existence ratio of silicon atoms in the entire part thereof.

Abstract: A two component developer comprising a toner and a carrier, wherein the toner includes: colored particles; and external additive particles comprising a complex oxide incorporating silicon atoms and at least one of titanium atoms and aluminum atoms, and a surface existing ratio of the silicon atoms (R2) in a surface of the external additive particles being larger than an average existing ratio of the silicon atoms (R1) in an entirety of the external additive particles, and carrier particles comprise magnetic material powder dispersed in a phenol-formaldehyde resin, and have an average of the shape coefficient SF-1 of 1.0 to 12 and an average of the shape coefficient SF-2 of 1.1 to 2.5, and a volume based median diameter of from 10 to 100 ?m.

Abstract: The present invention provides a developer for electrophotography which is superior in property of build up of electrification and in charge stability even in environments of high temperature and high humidity or in an environment of low temperature and low humidity where it is difficult for a developer to retain its electrostatic charge performance, and which can provide an image free from fogging and decrease in density for a long term, that is, a developer for electrophotography containing composite oxide particles which include metal titanate particles containing titanium as a first metal atom and a second metal atom and containing therein 0.009 to 0.350% by weight of a third metal atom selected from the group consisting of the metal atoms belonging to Group 5A of the long form of the periodic table of elements.