Abstract: Resin particles each include a crystalline polyester resin, an amorphous polyester resin, a release agent, and a colorant. The crystalline polyester resin includes an acid component and an alcohol component as constitutional units, and the acid component of the crystalline polyester resin includes plant-derived dicarboxylic acid having 12 or less carbon atoms. The crystalline polyester resin is present as domains in a matrix of the amorphous polyester resin within each resin particle, an average major axis of the domains of the crystalline polyester resin is 2.0 micrometers or less, and an average aspect ratio (major axis/minor axis) of the domains is 4.0 or greater. The resin particles have a carbon radioisotope 14C concentration of 5.4 pMC or greater.

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: 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: [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 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 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 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 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 communication apparatus which communicates with an external apparatus by receiving a communication request transmitted from the external apparatus based a call-out number uniquely allocated to the communication apparatus, includes: a communication request receiver which receives identification information allocated to the external apparatus and the communication request independently of a call-out number of the external apparatus; a display which displays information; an information storage which stores an association table associating the identification information of the external apparatus with apparatus information used for displaying in reception of the communication request from the external apparatus; and a display controller which, when the communication request receiver receives a communication request with identification information, displays apparatus information recorded in the association table stored in the information storage on the display, which is associated with identification information