Abstract: Provided are a toner and a two-component developer each of which: shows a small fluctuation in charge quantity and a small fluctuation in image density even under a high-temperature and high-humidity environment; and does not cause any member contamination even after endurance and hence can stably output an image. The toner and the two-component developer each have a feature in that positively chargeable strontium titanate fine particles are added to toner particles having fixed thereto negatively chargeable silica fine particles.

Abstract: A method of producing a toner containing a toner particle having a core-shell structure that has a core containing a resin and has a shell phase on a surface of the core, the shell phase being derived from a resin fine particle containing a resin A, and the resin A being a resin containing a segment derived from a crystalline polymer D, the method including steps (i), (ii) and (iii).

Abstract: The present invention provides a toner excellent in both saturation and light resistance. The toner includes toner particles containing a binder resin and a colorant. The colorant is a pyridoneazo compound having a specific structure.

Abstract: A toner includes toner particles, each containing binder resin and a plurality of microcapsules dispersed therein, each of the microcapsules containing a liquid material. A method for forming an image on a medium includes forming an electrostatic latent image on a carrier, forming a toner image by developing the electrostatic latent image using the toner, transferring the toner image onto a medium, and fixing the transferred toner image on the medium.

Abstract: An organic photoconductor including an electrically conductive substrate, a photosensitive layer disposed on the electrically conductive substrate, and a protection layer disposed on the photosensitive layer, wherein the protection layer includes a polymer composition and a plurality of electrically conductive metal oxide particles, and wherein the polymer composition is a product of a curing reaction with a multifunctional spherical dendrimer, a first multifunctional acryl compound having a urethane bond, and a second multifunctional acryl compound having a silicon-containing group and a fluorine-containing group.

Abstract: An electrostatic latent image developing toner includes a plurality of toner particles each including a toner core and a shell layer. The shell layer includes a plurality of first shell particles and a plurality of second shell particles. The first shell particles cover the toner core at a coverage of at least 25% and no greater than 50%. The second shell particles additionally cover the toner cores at a coverage of at least 5% and no greater than 30%. An SP value of the toner core is greater than an SP value of the first shell particles. The SP value of the first shell particles is greater than an SP value of the second shell particles.

Abstract: An electrostatic charge image developing carrier contains a core particle and a resin coat layer on a surface of the core particle, wherein the core particle has a BET specific surface area of from 0.05 m2/g to 0.10 m2/g, and the resin coat layer contains a nitrogen-containing (meth)acrylate resin.

Abstract: A toner is provided. The toner includes a binder resin, a colorant, a release agent and an external additive. The toner has an average circularity of from 0.965 to less than 0.985. The toner has BET specific surface area of less than 1.20 m2/g after liberation treatment of external additive.

Abstract: A toner is provided. The toner includes a binder resin and a release agent. The release agent has an average aspect ratio of 31 or more, when the average aspect ratio is determined from cross-sectional images of the toner observed with a transmission electron microscope (TEM).

Abstract: A photoconductor and method of forming a photoconductor for an electrophotographic device comprising forming a charge generation material comprising a plurality of quantum dots, and forming an active region comprising one or more photoconductor layers comprising the charge generation material including the surface modified quantum dots.

Abstract: An electrostatic charge image developing toner includes a binder resin containing a polyester resin, a release agent, a colorant, and an aromatic aldehyde compound, the content of which exceeds 100 ppm and is equal to or smaller than 1200 ppm.

Abstract: The present invention relates to a magnetic carrier for an electrophotographic developer comprising spherical magnetic composite particles comprising a phenol resin as a binder and ferromagnetic iron oxide particles bonded to each other through the phenol resin, wherein the spherical magnetic composite particles have a ten-point mean roughness Rz of 0.3 to 2.0 ?m. The magnetic carrier for an electrophotographic developer according to the present invention exhibits an excellent durability against peeling-off and abrasion of coating resins formed thereon and a high stability to mechanical stress exerted onto the carrier, is free from occurrence of spent toner, can be stably held over a long period of time without occurrence of fogging and unevenness in density of toner images, and can keep high-quality images with an excellent gradation for a long period of time.

Abstract: An electrostatic latent image developing toner contains a plurality of toner particles. The toner particles each include a toner mother particle and an external additive. The toner mother particle includes a toner core and a shell layer disposed over a surface of the toner core. The shell layer contains a thermosetting resin and a thermoplastic resin. The toner mother particles have a surface roughness of no less than 10 nm and no greater than 15 nm. The toner mother particles have a surface adsorbability of no less than 10 nN and no greater than 20 nN.

Abstract: A surface layer of the electrophotographic photosensitive member has a change region in which a ratio of the number of carbon atoms with respect to the sum of the number of silicon atoms and the number of carbon atoms gradually increases toward a surface side of the electrophotographic photosensitive member from a photoconductive layer side, wherein the change region has an upper charge injection prohibiting portion containing a Group 13 atom, and a surface-side portion which is positioned closer to the surface side of the electrophotographic photosensitive member than the upper charge injection prohibiting portion and does not contain the Group 13 atom, and the distribution of the Group 13 atom in a boundary portion between the surface-side portion and the upper charge injection prohibiting portion is precipitous.

Abstract: The toner according to the present invention comprises a matrix phase composed of a vinyl resin, and domain phases composed of a non-crystalline polyester resin dispersed in the matrix phase, and a number-average domain diameter of the domain phases composed of the non-crystalline polyester resin is 30 to 150 nm. The toner satisfies relation represented by a specific requirement of the total area of the domain phases present in a surface layer area of the toner particle, and the total area of the domain phases present in areas other than the surface layer area, in a given cross-section of the toner particle.

Abstract: Provided is coating film-removing method for removing unnecessary coating film on outer peripheral surface of lower side of cylindrical substrate by dip coating, the method comprising: supplying solvent to inside of substrate; causing, through use of outer peripheral surface coating film-removing member configured to remove coating film at portion to be subjected to coating film removal in outer peripheral surface of the substrate, the outer peripheral surface coating film-removing member to abut against region ranging from upper end to lower end of coating film at the portion; and removing, under a state wherein the outer peripheral surface coating film-removing member abuts against the region, the coating film at the portion through rubbing by relatively rotating the substrate and the outer peripheral surface coating film-removing member while supplying the solvent, which is supplied to inside and then flows to lower end of the substrate, to abutting portion.

Abstract: (Meth)acrylate resins of at least one bio-based (meth)acrylate monomer, where the monomer includes a rosin or isosorbide moiety obtained from natural sources, can be used in toner, carrier coating or both.

Abstract: It is an object of the present invention to provide a toner capable of being fixed at low energy and forming an image with high resistance to external forces, such as rubbing and scratching. The object is achieved by a toner including toner particles that contain a binder resin and a colorant, a sea-island structure including a sea portion composed of the crystalline resin C serving as a main component and island portions composed of the amorphous resin A serving as a main component is observed at the observation of a cross section of each of the toner particles.

Abstract: A toner is provided including large particle-diameter external additives with sweep to the concaves of a toner particle suppressed, so that the large particle-diameter external additives function as spacer particles for a long period. The toner includes toner particles which contain a binder resin and magnetic material, and organic-inorganic composite fine particles having a structure including inorganic fine particles embedded in a vinyl resin particle. The presence state of the magnetic material on the toner particle surface satisfies specific conditions and the presence state of the organic-inorganic composite fine particles on the toner surface satisfies specific conditions.

Abstract: A toner, including: a polyester resin, wherein the polyester resin includes a diol component and a crosslink component as constituent components thereof, wherein the diol component contains an aliphatic diol having 3 to 10 carbon atoms in an amount of 50 mol % or more, wherein the crosslink component contains a trihydric or higher aliphatic alcohol, and wherein the toner has a glass transition temperature (Tg1st) of 20° C. to 50° C., where the glass transition temperature (Tg1st) is measured in first heating in differential scanning calorimetry (DSC) of the toner.