Abstract: A magnetic single-component developer includes a spherical toner containing at least a magnetic powder and not containing a release agent in a binder resin, and a nonspherical toner containing at least a magnetic powder and a release agent in a binder resin. According to measurements taken from a scanning electron microscope image taken from 100 toner particles in the magnetic single-component developer, the spherical toner has a circularity of 0.980 or more, the nonspherical toner has a circularity of 0.960 or less, and a particle number ratio (A)/(B) of the number (A) of particles of the spherical toner to the number (B) of particles of the nonspherical toner is 3/7 or more and 5/5 or less.

Abstract: The presently disclosed embodiments are directed generally to methods for making the core-shell fluorinated particles which are incorporated into the overcoat layers of an electrophotographic imaging member to reduce torque and cleaning failures during the photoreceptor cleaning process. The core-shell fluorinated particles are core-shell fluorinated nano- or micro-particles encapsulated in a melamine shell. The present embodiments also pertain to processes for making the overcoat layer comprising the core-shell fluorinated particles.

Abstract: A toner for developing electrostatic image comprising a toner particle containing a binding resin is disclosed. which, and In the toner the binding resin has a domain-matrix structure composed of a high elastic resin composing a domain and a low elastic resin composing a matrix, an arithmetic mean value of ratio (L/W) of the Length L to Width W of the domains is 1.5 to 5.0, domains having Length L in the range of 60 to 500 nm exist 80 number % or more, and domains having Width Win the range of 45 to 100 nm exist 80 number % or more, in a viscoelastic image of a cross section of the toner particle observed via an atomic force microscope.

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: Provided is a toner wherein when a solid image formed by the toner is irradiated with incident light at an incident angle of ?45° using a goniophotometer, a ratio (A/B) of a reflectance A at a light-receiving angle of +30° to a reflectance B at a light-receiving angle of ?30° is about 2 or more and about 100 or less.

Abstract: A process for producing a core-shell toner is provided in which the toner has core particles containing at least a binder resin (1), a colorant and a release agent and shell layers which contain at least a resin (2) and with which the core particles are covered; and the process including the steps of (A) mixing a binder resin-(1) dispersion, a colorant dispersion and a release agent dispersion, (B) adding to a mixed dispersion thus obtained an agglomerating agent to effect agglomeration, (C) adding to core agglomerated particles thus formed a mixture prepared by mixing the resin-(2) dispersion and a metal salt to make the resin (2) adhere to the surfaces of the core agglomerated particles, and (D) heating core-shell agglomerated particles thus formed to a temperature not lower than the glass transition temperatures of the binder resin (1) and resin (2) to effect fusion thereof.

Abstract: An electrostatic image developing toner including a toner particle (C), wherein the toner particle (C) has a structure in which a resin particle (A) containing at least a first resin (a) or a coated film (P) containing the first resin (a) is attached to a surface of a resin-containing particle (B) containing a second resin (b), and wherein the resin (b) includes a polyhydroxycarboxylic acid skeleton, and the resin (a) is a polyester resin containing a polybasic acid and a polyhydric alcohol.

Abstract: Toners containing encapsulated crystalline resin have lower minimum fix temperatures without charge degradation.

Abstract: A toner composition includes toner particles including an average diameter ranging from about 3 ?m to about 10 ?m, an average particle density of about 1.4 g/cm3 or less, and for a given particle size configured to have a decreased mass and reduced particle momentum. The toner particle can include one of a solid core and a solid outer shell, a porous core and a porous outer shell, and a solid outer shell with a hollow core. The porous and solid cores can include a low density material.

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: To provide a toner manufacturing method including: continuously mixing an oil phase with an aqueous phase to form an emulsified liquid using an emulsifying mechanism having an emulsified liquid circulation pathway and an emulsifying device equipped with a stirring blade; forming liquid droplets from the emulsified liquid by controlling the equilibrium between atomization and integration of the liquid droplets; and feeding the liquid droplets with stirring to a series of treatments including at least desolvation, filtration, washing and drying; wherein a product T of the solid content concentration (% by mass) of the oil phase and viscosity (mPa·s) measured with a rotating viscometer at 25° C., and 6 rpm satisfies 30,000?T?50,000.

Abstract: An erasable toner is prepared by mixing colored particles containing at least a color former compound, a color developer agent and a binder resin with de-coloring particles having a melting point higher than the fixing temperature of the colored particles. By using this toner, a colored image is formed by electrostatically transferring a toner image onto a medium, and heating the toner image at a temperature lower than the melting point of the de-coloring particles to form a fixed toner image in a color developed state, and the color of the fixed image is erased by heating the image to a temperature not lower than the melting point of the de-coloring particles. In this toner, the color developing function and the color erasing function are assigned to different particles so that the functions are separated from each other, and therefore, the formation of an image in a color developed state and the erasure thereof can be reliably and promptly achieved.

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: A toner including: a core particle; and fine resin particles, the core particle containing at least a binder resin, a releasing agent and a colorant, wherein the toner is in shape of particles, and each toner particle has a sea-island structure having the core particle and island portions, which are convex portions formed from the fine resin particles on surface of the core particle, wherein the binder resin contains first and second resins, and the fine resin particles are made of third resin, wherein the first resin is crystalline resin, and the second and third resins are non-crystalline resin, wherein the second resin has glass transition temperature (Tg2) and the crystalline resin has melting point (Tc1) where Tg2 is higher than Tc1, and wherein the third resin has glass transition temperature (Tg3) and the toner has glass transition temperature (Tgt) wherein Tg3 is higher than Tgt.

Abstract: Disclosed is a toner for electrostatic image development that has sufficient low-temperature fixability, can provide high post-fixing separability, and can be used for stable formation of images at high speed. The toner for electrostatic image development includes toner particles containing a binder resin. The binder resin contains as a part thereof a block copolymer having an A-B-A block copolymer structure including polymer blocks A composed of a structural unit derived from an alkyl methacrylate and a polymer block B composed of a structural unit derived from an alkyl acrylate. The glass transition point (TgA) of a homopolymer of the alkyl methacrylate forming the polymer blocks A is higher than the glass transition point (TgB) of a homopolymer of the alkyl acrylate forming the polymer block B.

Abstract: An electrostatic image developing toner including: toner particles; wherein the toner particles each contain: a core particle including a first resin and a colorant; and fine resin particles each formed of a second resin and existing in a surface of the core particle, wherein part of each fine resin particle is embedded in the core particle to form an embedded region, and the remaining part of the fine resin particle is exposed on the surface of the core particle to form an exposed region, and wherein each toner particle satisfies an expression of R1>R1? where, in a cross-section of the toner particle, R1? denotes an average diameter of openings of the first resin in which the second resin is embedded and R1 denotes an average diameter of the exposed regions.

Abstract: A transparent toner includes toner particles having a volume average particle diameter in the range of 18 ?m to 28 ?m, and satisfying formulae (1) and (2): 0.1?Ntb/Nta×100?2.5??(1) 0?Ntc/Nta×100?1.0??(2) Nta is the number of particles under the measurement conditions satisfying 0.5 ?m?circle-equivalent diameter?200 ?m, and 0.40?circularity?1.00; Ntb is the number of particles under the measurement conditions satisfying 0.5×Dta (?m)?circle-equivalent diameter?2.5×Dta (?m), and 0.60?circularity?0.90; and Ntc is the number of particles under the measurement conditions satisfying 2.5×Dta (?m)?circle-equivalent diameter?200 ?m, and 0.40?circularity?1.00; Dta is the average circle-equivalent diameter under the measurement conditions satisfying 0.5?m?circle-equivalent diameter?200 ?m, and 0.40?circularity?1.00.

Abstract: According to one embodiment, a method of manufacturing a color erasable developing agent including preparing a dispersion containing a fine particle containing a leuco dye and a developer, a fine particle containing a color erasing agent, a toner binder resin fine particle and a medium, aggregating the fine particles in the medium, and heat fusing the aggregate to form a toner particle is provided.

Abstract: A toner including a core particle and projections at a surface of the core particle is provided. The core particle includes a binder resin and a colorant. The binder resin includes a crystalline resin as a major component. Each of the projections consists of a fine resin particle. An average length of long sides of the projections is not less than 0.15 ?m and less than 0.5 ?m. A standard deviation of lengths of the long sides of the projections is 0.2 or less. A surface coverage of the toner with the projections is within a range of 30 to 90%.

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: An electrostatic image developing toner for pressure fixing includes a binder resin that has a sea-island structure, wherein a difference between a glass transition temperature of a resin forming the sea phase and a glass transition temperature of a resin forming the island phase is about 30° C. or more, both of the glass transition temperatures of the resin forming the sea phase and the resin forming the island phase are less than about 55° C., and the island phase has a major axis of about 150 nm or less.

Abstract: An electrostatic image developing toner includes toner particles that contain a binding resin, a coloring agent and a release agent and that have D50 of from about 2.0 ?m to about 8.0 ?m, D50 standing for a volume-average particle size of the toner particles; and non-colored release agent particles, wherein out of the non-colored release agent particles, those ranging in volume-average particle size of from about 0.8 to about 1.2 times a value of D50 are present in a proportion of about 50 or below per 5,000 of the toner particles.

Abstract: A toner including a main body particle, a layer B located overlying the main body particle, and a layer A located overlying the layer B is provided. The binder resin includes an amorphous resin and a crystalline resin. The layer B is comprised of particles of a resin B. The layer A is comprised of particles of a resin A. A method of manufacturing the above toner is also provided. The method includes dissolving or dispersing toner components in an organic solvent to prepare a toner components liquid. The toner components include the binder resin. The method further includes emulsifying the toner components liquid in an aqueous medium to prepare an emulsion. The aqueous medium contains the particles of the resins A and B. The method further includes removing the organic solvent from the emulsion and heating the emulsion.

Abstract: A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the toner particles are made by a process in which charge control agent is added and adhered to the particle surface through washing steps and is maintained through the drying steps. The process of the present embodiments impart desirable charging characteristics to the toner particles.

Abstract: There is provided a toner block, which is formed by preparing a toner suspension in which toner particles are dispersed in water so that a water amount is 32.5 to 37% by mass; absorbing water contained in the toner suspension by a water absorptive material which absorbs 0.2 ml of water within 3 minutes to prepare an aggregate of the toner particles containing water of not more than 32.3% by mass; and drying the aggregate, and which has a maximum compressive stress of 80000 to 550000 N/m2 upon collapse.

Abstract: Environmentally friendly toner particles are provided which may include a bio-based amorphous polyester resin, optionally in combination with another amorphous resin and/or a crystalline resin. Methods for providing these toners are also provided. In embodiments, the bio-based amorphous polyester resin is modified with a multi-functional bio-based acid, thereby providing acid-functionalized polyesters, which can be readily emulsified in emulsion aggregation processes for toner fabrication.

Abstract: A toner including a plurality of fine particles includes a core including first latex particles, a wax and a pigment, or a first latex particle-wax complex and a pigment, and a first shell layer including second latex particles and covering at least a portion of the surface of the core, a method of preparing the toner, a method of forming images using the toner, and an image forming device including a toner transferring unit. The toner can have improved fixing and charging properties, preserving properties at a high temperature and high humidity, glossness and anti-offset properties by reducing a domain size of a wax dispersed in the toner and improving dispersibility of the wax.

Abstract: The present invention relates to a polymerized toner including a low molecular weight polymer having a weight average molecular weight of 3000 to 30,000 and a method for preparing the same, wherein the polymerized toner can realize excellent gloss and offset feature and can also can exhibit excellent performance in the applications of high speed copying, development of transferred photos, etc.

Abstract: An electrostatic image developing toner including toner core particles each containing at least a first resin and a colorant, and fine resin particles formed of a second resin, wherein part of each of the fine resin particles is embedded in each of the toner core particles, and the remaining part of the fine resin particle is exposed on a surface of the toner core particle to form a protrusion, and wherein when a rate of the part of the fine resin particle to the fine resin particle is indicated by an embedment rate, an average of the embedment rates in the fine resin particles is 40% to 80%.

Abstract: To provide a magnetic toner which: enables a stable image density to be obtained irrespective of a use environment; and exhibits excellent low-temperature fixability, little image deterioration upon fixation, high coloring power, and a reduced toner consumption. The present invention relates to a magnetic toner containing at least: a binder resin; and a magnetic body. The binder resin contains a polyester unit. The toner has a weight average particle size of 5.0 to 9.0 ?m, a true specific gravity of 1.3 to 1.7 g/cm3, and a saturated magnetization of 20 to 35 Am2/kg in a magnetic field of 796 kA/m. The dielectric loss tangent (tan ?) of the toner satisfies (tan ?H?tan ?L)/tan ?L?0.20 at 100 kHz.

Abstract: Polymeric porous particles have a continuous solid phase and at least two different internal pores that are isolated from each other within the continuous phase. At least one set of discrete pores contains a marker material, and some instances, each set of discrete pores contain different pores marker materials that are isolated from each other. These marker materials are detectably different from each other. The porous particles can be spherical or non-spherical and can be used in any situation where the detectably different marker materials can be evaluated.

Abstract: An article comprises one or more porous particles. Each porous particle comprises a polymer that provides a continuous solid phase including an external particle surface, and first and second discrete pores that are isolated from each other and dispersed within the continuous solid phase. The porous particle further comprises a first marker material present in the first discrete pores, and a second marker material that is detectably different from the first marker material and is present within the second discrete pores. The marker materials can provide a means for identifying documents, clothing, or other articles as genuine, and providing a detectable security system.

Abstract: To provide an electrostatic charge developing toner in which resin fine particles and inorganic fine particles are externally added to toner base particles, wherein the toner base particles include at least binder resin and colorant, the resin fine particles are monodispersed and fixed to surfaces of the toner base particles, and following equations are established: a=70 to 160 nm, b/a=0.2 to 0.5, and c/a=0.6 to 0.8, where “a” represents an average of diameters (nm) of circular surfaces of contact between the fixed resin fine particles and toner base particle surfaces, “b” represents an average of heights (nm) of the resin fine particles from the contact surfaces, and “c” represents an average diameter (nm) of the resin fine particle at the height b/2.

Abstract: A magenta toner characterized by satisfying, in DSC measurement, 40.0?Tg(0.5)?60.0 and 2.0?Tg(4.0)?Tg(0.5)?10.0, wherein when preparing a solution of which the magenta toner is dissolved in ethyl acetate, and defined the concentration of the thereof as Cm1 (mg/ml), and the light absorbance thereof at a wavelength of 538 nm as A(ethyl acetate)538, the ratio of A(ethyl acetate)538 to Cm1 satisfies the formula, A(ethyl acetate)538/Cm1<0.15, and, when preparing a solution of which the magenta toner is dissolved in chloroform, and defined the concentration of the thereof as Cm2 (mg/ml), and the light absorbance thereof at a wavelength of 538 nm as A(chloroform)538, the ratio of A(chloroform)538 to Cm2 satisfies the formula, 2.00<A(chloroform)538/Cm2<6.55.

Abstract: A toner including an amorphous resin (R), a crystalline material (A) which is compatible with the amorphous resin (R) and has a melting point of 80° C. or lower, a resin (I) which is different from the amorphous resin (R), and a colorant, wherein the crystalline material (A) is capsulated by the resin (I) and the capsulated crystalline material (A) is present in the amorphous resin (R).

Abstract: The present disclosure describes a polyester that contains plural pendant adjacent carboxylic acid or acid salt side groups for use in making a toner for use in imaging devices.

Abstract: It is an object of the present invention to provide a toner having the transfer efficiency and the cleanability in combination, exhibiting excellent stress resistance, and ensuring the low-temperature fixing. A toner characterized in that the average circularity of the above-described toner is 0.960 or more, and 0.985 or less, where the average circularity is analyzed by dividing particles having a circle equivalent diameter of 1.98 ?m or more, and 200.00 ?m or less, the number A of toners having a circularity of 0.990 or more, and 1.000 or less is 25.0 percent by the number or less, and the percentage of the number of particles B having a circle equivalent diameter of 0.50 ?m or more, and 1.98 ?m or less relative to the total particles of 0.50 ?m or more, and 200.00 ?m or less is 10.0 percent by the number or less.

Abstract: A toner containing core particles each containing at least a resin A having a polyester skeleton and a colorant; and vinyl resin fine particles each of which encapsulates a resin B having at least a polyester skeleton and an endothermic peak measured by differential scanning calorimeter (DSC) at 40° C. to 110° C., wherein the vinyl resin fine particles are attached onto each of the core particles.

Abstract: A toner including a core particle and projections at a surface of the core particle is provided. The core particle includes a binder resin and a colorant. The binder resin includes a crystalline resin as a major component. Each of the projections consists of a fine resin particle. An average length of long sides of the projections is not less than 0.15 ?m and less than 0.5 ?m. A standard deviation of lengths of the long sides of the projections is 0.2 or less. A surface coverage of the toner with the projections is within a range of 30 to 90%.

Abstract: Toner particles are provided which may, in embodiments, include a core and a shell formed in situ. The resins utilized to form the core, the shell, or both, may be contacted with a water soluble initiator. The resin, in embodiments present in the shell, cross-links at a temperature near the temperature for coalescence, and may prevent a crystalline resin in the core from migrating to the toner surface.

Abstract: A color particle is disclosed, comprising a color-exhibitive piece which comprises microparticles for structural color and a matrix and is dispersed in a binder resin, wherein the color particle meets the following requirement: 1.5?A/B?5.0 wherein A is a major axis diameter of the color particle and B is a minor axis diameter of the color particle; and an angle of a longitudinal direction of the color-exhibitive piece to a major axis direction of the color particle falls within a range of ±20 degrees.

Abstract: Disclosed is a decolorable toner containing a binder resin and a coloring agent which contains a color former compound and a color developing agent and has a capsule structure such that it is covered with an outer shell, and having a volume average particle diameter of from 5.0 to 15.0 ?m and a number-based particle size distribution CV of 35% or less.

Abstract: Provided are a toner using a resin having an active hydrogen-containing group, and a method of preparing the toner. The toner using a resin having an active hydrogen-containing group includes a binder resin (A), a cross-linked resin including a THF insoluble content of 99-100 weight %, a colorant, and at least one additive. The cross-linked resin is arranged in the form of a plurality of islands in each particle of the toner.

Abstract: The present invention is toner particle that includes a continuous phase of binder polymer and a second phase of hydrocolloid. The particle has a porosity of at least 10 percent.

Abstract: A toner to develop an electrostatic latent image which includes a latex, a colorant, and a release agent, wherein the toner has a complex viscosity (?*) in a range of about 2.5×102 to about 1.0×103 Pa·s and a loss tangent (tan ?) in a range of about 1.3 to about 2.3 at a temperature of about 160° C. and wherein the ?* is defined by a formula ?*=(G?2+G?2)½/w, and the tan ? is defined by a formula G?/G?, where G? is a storage elastic modulus and G? is a loss elastic modulus as determined under the following conditions of an angular velocity being about 6.28 rad/s and at a temperature increasing at a rate of about 2.0° C./min.

Abstract: There are provided a toner and a two-component developer effective to make exudation of a release agent easy during fixing and to prevent occurrence of high-temperature offset, in which both the preservation stability and the fixing property are improved at the same time. The capsule toner comprises a toner base particle and a resin layer formed of fine resin particles with which a surface of the toner base particle is coated. In the capsule toner, both of the following expressions are satisfied: A<B; and (B?A)<3×103Pa where A is a storage elastic modulus of the toner base particle at a softening temperature of the toner base particle, and B is a storage elastic modulus of fine resin particle at the softening temperature of the toner base particle.

Abstract: A color toner is provided which has a dielectric strength equal to or lower than that of a black toner containing carbon black, and which has an improved charging rate and charge stability against changes in the environment.

Abstract: To provide a process for efficiently producing a toner for developing an electrostatic charge image, which is scarcely susceptible to aggregation of the toner and free from blocking during the storage or from soiling the image forming apparatus and which is excellent in image characteristics. A process for producing a toner for developing an electrostatic charge image, characterized by supplying a monomer into a dispersion containing wax and a polymerizable monomer having a C8-100 hydrocarbon group, carrying out the polymerization, followed by flocculation treatment.

Abstract: A toner for developing an electrostatic image, includes: colored particles containing a colorant and a binder resin, and two or more kinds of inorganic particles that are externally added to a surface of the colored particles, in which the two or more kinds of inorganic particles contain titanium-containing particles and silica-containing particles, an exposure ratio of the surface of the colored particles is about 25% or less, and a ratio of the silica-containing particles that are in contact with the colored particles is about 10% by number or less.

Abstract: A toner usable with electrophotography includes an iron (Fe) content in the toner is in a range of about 1.0×102 ppm to about 1.0×104 ppm and a circle equivalent diameter of a sectional area of an Fe agglomerating agent is in a range of about 1.0 nm to about 2.0×102 nm.