Abstract: A resin particle contains a binder resin, wherein the resin particle has a loss tangent ? of 1.8 or greater at angular velocity of from 0.1 to 100 rad/s as measured by frequency sweep at 80 degrees C.

Abstract: A resin particle contains a core containing a first binder resin containing an alcohol component and a shell containing a second binder resin containing at least one of polyethylene terephthalate and polybutylene terephthalate, wherein the first binder resin contains a plant-derived alcohol monomer accounting for 5 to 35 percent by mass of the entire of the alcohol component and the at least one of polyethylene terephthalate and polybutylene terephthalate accounts for 10 to 70 percent by mass of the entire of the second binder resin.

Abstract: Resin particles that can exhibit high degree of coloring and have high charge stability are provided. Resin particles include a base particle including a binder resin and a pigment having an isoindoline skeleton, wherein a longitudinal diameter of the base particle is L, an overlapped area where the cross-section of the base particle overlaps with a passage of circle C when a center of the circle C with a radius (L/10) moves along a contour of the cross-section of the base particle is defined as a surface layer of the resin particle, wherein the pigment having isoindoline skeleton present on the surface layer of the base particle relative to an entire pigment having isoindoline skeleton present on the cross-section of the base particle in a cross-sectional image of the resin particle is less than 30%, and wherein a gel fraction of the base particle is 20% by mass or more.

Abstract: [Summary] To provide resin particles with high weather resistance even when a plant-derived resin and PET are used as binder resins. [Tasks] The Resin particles includes a binder resin and a colorant, wherein the binder resin contains polyethylene terephthalate and a plant-derived resin, wherein the colorant contains an isoindoline pigment, and wherein a radioisotope 14C concentration in the resin particles is 5.4 pMC or higher.

Abstract: Resin particles are provided. The resin particles include one or more binder resins, a release agent, and a colorant. The one or more binder resins include an amorphous resin. The amorphous resin contains an alcohol component as one of the constituents thereof. The alcohol component includes a plant-derived alcohol component. The resin particles contain a tetrahydrofuran (THF)-insoluble component by an amount of from 5% by mass through 40% by mass.

Abstract: [Summary] The invention is to provide resin particles capable of forming images with reduced environmental load, excellent low-temperature fixability, and chargeability characteristics, and excellent image quality can be obtained even when plant-derived resins are used. [Tasks] Resin particles includes polyethylene terephthalate or polybutylene terephthalate, wherein a concentration of radioactive carbon isotope 14C in the resin particles is 10.8 pMC or more, and wherein the resin particles contain 0.05% by mass or more and 1% by mass or less of a divalent metal element excluding an external additive.

Abstract: Resin particles each include a binder resin. The binder resin includes an amorphous polyester resin and a crystalline resin. The amorphous polyester resin includes alcohol monomers as one of constituent components. The alcohol monomers include propylene glycol. Abundance of the crystalline resin in a region from an outermost surface of each of the resin particles to a depth of 150 nm from the outermost surface is 4% or less relative to an amount of the crystalline resin in an entire region of each of the resin particles. A radiocarbon 14C content of the resin particles is 5.4 pMC or greater.

Abstract: A glittering toner includes: a flat metallic pigment having a surface coated with a resin; a polyester-styrene acrylic composite resin; and a polyester resin. When a solubility parameter of the polyester-styrene acrylic composite resin is represented by SP1 (cal/cm3)1/2 and a solubility parameter of the polyester resin is represented by SP2 (cal/cm3)1/2, the SP1 and the SP2 satisfy a relational expression (1): [SP2?SP1>0.3] and the SP1 satisfies a relational expression (2): [10<SP1].

Abstract: A resin particle contains resin containing a tetrahydrofuran insoluble portion containing a non-linear polymer in which a non-linear prepolymer is cross-linked with a metal ion, wherein the resin particle has a carbon-14 concentration of 5.4 pMC or greater, wherein the tetrahydrofuran insoluble portion has a glass transition temperature of from ?60 to lower than 0 degrees C. as measured by differential scanning calorimetry.

Abstract: A toner has excellent low temperature fixing property, heat resistant preservability, and stable image quality. The toner contains a core including a crystalline polyester, and a shell formed on a surface of the core. An aspect ratio of the crystalline polyester in the toner is within a range from 1 to 3, and an average length of a longitudinal diameter of the crystalline polyester is within a range from 10 nm to 500 nm.

Abstract: A toner includes a binding resin; and a metal crosslinking agent that forms a metal crosslinking with the binding resin. A measurement curve of a storage elastic modulus G? in a dynamic viscoelasticity measurement has a maximum value in a range of 100° C. or more.

Abstract: A toner is provided. The toner comprises a glittering pigment and a coloring pigment. The glittering pigment is disposed inside the toner. The coloring pigment comprises a yellow pigment comprising an isoindoline pigment.

Abstract: A toner is provided. The toner comprises a glittering pigment and a coloring pigment. The glittering pigment is disposed inside the toner. The coloring pigment comprises a yellow pigment comprising an isoindoline pigment.

Abstract: Image forming apparatus, including: image bearer; charging unit for electrically charging image bearer surface; developing unit for developing with toner, electrostatic latent image formed over image bearer by exposure unit for performing light exposure; transfer unit for transferring developed toner to receiving member; and cleaning unit for cleaning toner remaining over image bearer without being transferred, wherein the toner contains: external additives; and base particles made of at least binder resin and colorant, external additive content of the toner is from 4 to 7 parts by mass relative to 100 parts by mass of base particles, primary particles of at least one external additive have a number average particle diameter of 0.01 to 0.05 ?m, cleaning unit includes an elastic-body blade having surface elastic modulus of from 15 to 25 N/mm2 and surface friction coefficient of from 0.5 to 0.7 at an abutment part thereof abutting on image bearer.

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 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: 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: An image forming apparatus is provided which includes an image bearer, a charger, an irradiator, a developing device to develop an electrostatic latent image on the image bearer with a toner to form a toner image, a transfer device to transfer the toner image onto a transfer medium, and a cleaner to remove toner particles remaining on the image bearer without being transferred. The toner includes a mother particle including a binder resin and a colorant and one or more external additives. At least one of the external additives includes primary particles having a number average particle diameter in the range of 0.05 to 0.30 ?m. The cleaner includes an elastic body blade having a contact part with the image bearer. The contact part has a surface elastic modulus in the range of 15 to 25 N/mm2 and a surface friction coefficient in the range of 0.5 to 0.7.

Abstract: A toner including: a core particle containing at least a binder resin, a colorant and a releasing agent; and a shell on a surface of the core particle, wherein the toner gives a supernatant having a transmittance of 50% to 95% with respect to light having a wavelength of 800 nm, where the supernatant is formed after 3 g of the toner is added to 40 g of ion-exchange water containing 0.5% by mass of sodium dodecyl sulfate, followed by stirring for 90 min and by irradiating with ultrasonic waves of 20 kHz and 80 W for 5 min, and a liquid containing the toner dispersed therein is centrifugated at 3,000 rpm for 5 min.

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.