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 include a binder resin in each of the resin particles. The binder resin includes a biomass-derived resin, and polyethylene terephthalate or polybutylene terephthalate. An amount A of a biomass-derived component of the biomass-derived resin and an amount B of the polyethylene terephthalate or the polybutylene terephthalate satisfy A>B. Each of the resin particles has a core-shell structure including a shell layer and a core layer. An average thickness of the shell layer is from 100 nm to 500 nm.

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 foamed body includes a polylactic acid resin. An amount of the polylactic acid resin is 99.5% by mass or greater relative to a total amount of organic matter in the foamed body. A gel fraction of the foamed body is 0.1% or less. An expansion ratio of the foamed body is 5 times or greater.

Abstract: A toner for electrostatic charge image development, wherein a spin-spin relaxation time of the toner at 90° C. is 0.30 msec or more but 1.50 msec or less, and a spin-spin relaxation time of the toner at 50° C. is 0.0185 msec or more but 0.0300 msec or less, the spin-spin relaxation time of the toner at 90° C. and the spin-spin relaxation time of the toner at 50° C. being obtained by Hahn echo method of pulse NMR analysis.

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 includes a crystalline polyester resin and an amorphous polyester resin. A ratio of the storage modulus of the toner G? (TO) at a temperature TO to the storage modulus of the toner G? (TO+3) at a temperature TO+3 is greater than or equal to 10, in a case where the temperature TO is within a range from 50° C. to 65° C.

Abstract: A toner including: a plate-shaped pigment containing a metal as a main component; and a binder resin containing polyester resin (A) that is insoluble in THF, wherein: a weight average molecular weight (Mw) of a tetrahydrofuran (THF)-soluble component of the toner as determined by gel permeation chromatography (GPC) is 5,000 or higher but 14,000 or lower; and a glass transition temperature (Tg) of a THF-insoluble component of the toner as determined from a differential scanning colorimetry (DSC) curve at first heating in DSC is ?60° C. or higher but 10° C. or lower.

Abstract: A toner including toner base particles each including a binder resin and a colorant, and external additive, wherein the toner satisfies conditions (a), (b), and (c) below: (a) storage elastic modulus G?(50) of the toner at 50° C. and storage elastic modulus G?(90) of the toner at 90° C. satisfy Formula (1); G?(50)/G?(90)?6.0×102??Formula (1) (b) a BET specific surface area Bt(m2/g) of the toner and a coverage Ct (%) of the toner base particles covered with the external additive satisfy Formula (2); and Bt?0.03×Ct?1.60??Formula (2) (c) the external additive includes at least cohered particles, the cohered particles are non-spherical secondary particles each formed through cohesion of primary particles, and a number average secondary particle diameter of the cohered particles is 130 nm or greater.

Abstract: A toner for electrostatic charge image development, wherein a spin-spin relaxation time of the toner at 90° C. is 0.30 msec or more but 1.50 msec or less, and a spin-spin relaxation time of the toner at 50° C. is 0.0185 msec or more but 0.0300 msec or less, the spin-spin relaxation time of the toner at 90° C. and the spin-spin relaxation time of the toner at 50° C. being obtained by Hahn echo method of pulse NMR analysis.

Abstract: An image forming apparatus is provided that includes: first and second electrostatic latent image bearers; first and second electrostatic latent image forming devices; first and second developing devices configured to develop first and second electrostatic latent images with a colored toner and a special-color toner to form a colored toner image and a special-color toner image, respectively; a primary transfer device configured to transfer the colored toner image and the special-color toner image onto an intermediate image bearer in an overlapping manner to form a composite toner image; a secondary transfer device configured to transfer the composite toner image onto a recording medium; and a fixing device configured to fix the composite toner image thereon. The special-color toner comprises plate-like and/or film-like pigments. An absolute difference in volume resistivity between the special-color toner and the colored toner is 0.30 log ? cm or less.

Abstract: A toner for developing an electrostatic image is provided. The toner comprises a binder resin and a glitter pigment having an average surface roughness Ra of 100 nm or less.

Abstract: A toner including: a plate-shaped pigment containing a metal as a main component; and a binder resin containing polyester resin (A) that is insoluble in THF, wherein: a weight average molecular weight (Mw) of a tetrahydrofuran (THF)-soluble component of the toner as determined by gel permeation chromatography (GPC) is 5,000 or higher but 14,000 or lower; and a glass transition temperature (Tg) of a THF-insoluble component of the toner as determined from a differential scanning colorimetry (DSC) curve at first heating in DSC is ?60° C. or higher but 10° C. or lower.

Abstract: A toner including toner base particles each including a binder resin and a colorant, and external additive, wherein the toner satisfies conditions (a), (b), and (c) below: (a) storage elastic modulus G?(50) of the toner at 50° C. and storage elastic modulus G?(90) of the toner at 90° C. satisfy Formula (1); G?(50)/G?(90)?6.0×102??Formula (1) (b) a BET specific surface area Bt(m2/g) of the toner and a coverage Ct (%) of the toner base particles covered with the external additive satisfy Formula (2); and Bt?0.03×Ct?1.60??Formula (2) (c) the external additive includes at least cohered particles, the cohered particles are non-spherical secondary particles each formed through cohesion of primary particles, and a number average secondary particle diameter of the cohered particles is 130 nm or greater.

Abstract: An image forming apparatus is provided that includes: first and second electrostatic latent image bearers; first and second electrostatic latent image forming devices; first and second developing devices configured to develop first and second electrostatic latent images with a colored toner and a special-color toner to form a colored toner image and a special-color toner image, respectively; a primary transfer device configured to transfer the colored toner image and the special-color toner image onto an intermediate image bearer in an overlapping manner to form a composite toner image; a secondary transfer device configured to transfer the composite toner image onto a recording medium; and a fixing device configured to fix the composite toner image thereon. The special-color toner comprises plate-like and/or film-like pigments. An absolute difference in volume resistivity between the special-color toner and the colored toner is 0.30 log ? cm or less.