Abstract: A photoconductor that includes, for example, a supporting substrate, an optional ground plane layer, an optional hole blocking layer, an optional adhesive layer, a photogenerating layer, a charge transport layer, and an optional protective coating, and where the charge transport layer contains a mixture of a charge transport component and a polyarylatecarbonate.

Abstract: A toner set for electrophotography, including a black toner; a yellow toner; a magenta toner; a cyan toner; and a bright yellow toner, wherein the magenta toner includes a magenta colorant mainly including C.I. Pigment Red 122, the yellow toner has a hue angle of from 93 to 100° and the bright yellow toner has a hue angle of from 60 to 85° in L*a*b* color system.

Abstract: The electrographic printing of one or more multi-channeled layers having a particular pattern by electrographic techniques that produces a three-dimensional optical waveguide electrographically. Such electrographic printing comprises the steps of forming a desired print image, electrographically, on a receiver member utilizing predetermined sized marking particles; and, where desired, forming one or more final multi-channeled layers utilizing marking particles of a predetermined size or size distribution.

Abstract: The present invention is to provide a multilayer type electrophotographic photoconductor capable of stably obtaining a high image quality image over a long term by restraining the exposure memory and the photo memory, and an image forming apparatus comprising such a multilayer type electrophotographic photoconductor. A multilayer type electrophotographic photoconductor comprising a charge generating layer containing at least a charge generating agent on a base member directly or via an intermediate layer, and a charge transporting layer containing at least a charge transporting agent and a binder resin formed successively, wherein the light absorption degree at a 680 nm wavelength light beam in the photoconductive layer of the multilayer type electrophotographic photoconductor is of a value of 0.8 or less, and the light absorption degree at a 450 nm wavelength light beam is of a value of 1.

Abstract: The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrophotographic, including digital printing, apparatuses. More particularly, the embodiments pertain to an improved electrophotographic imaging member comprising a charge transport layer comprising a novel combination of a tetraaryl polycarbonate copolymer binder and perfluorinated fillers. The present charge transport layer provides reduced wear rate and long service life.

Abstract: An electrostatic latent image developing toner contains a binder resin, a colorant, europium, and bismuth.

Abstract: An image-forming method uses an electrophotographic photosensitive member having a surface layer formed of a hydrogenated amorphous silicon carbide in which a ratio of the number of carbon atoms to the sum of the number of silicon atoms and the number of the carbon atoms in the surface layer is 0.61 or more and 0.75 or less, and the sum of the atomic density of the silicon atoms and the atomic density of the carbon atoms in the surface layer is 6.60×1022 atoms/cm3 or more, and the peak wavelength of pre-exposure light is shorter than the peak wavelength of image exposure light.

Abstract: An electrophotographic photosensitive member comprises a charge-transporting layer which is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a matrix comprising: at least one resin selected from the group consisting of a polycarbonate resin C and a polyester resin D; and at least one charge-transporting substance selected from the group consisting of a compound represented by the following formula (1) and a compound represented by the following formula (1?), and a domain comprising a polycarbonate resin A.

Abstract: Provided is an image holding member for an image forming apparatus including a support; and a photosensitive layer disposed on the support and containing a compound represented by the following formula (I): wherein in the formula (I), R1's each independently represent a substituted or unsubstituted, linear or branched alkyl group having from 1 to 8 carbon atoms; Ar's each independently represent a substituted or unsubstituted phenyl group, a substituted or unsubstituted monovalent polynuclear aromatic hydrocarbon group having two aromatic rings, a substituted or unsubstituted monovalent condensed aromatic hydrocarbon group having two or three aromatic rings, or a substituted or unsubstituted monovalent aromatic heterocyclic group; and n's each independently represent a number of from 0 to 7.

Abstract: A toner containing toner particles, each toner particle containing: a releasing agent; a colorant; and a binder resin containing at least a crystalline polyester resin and a non-crystalline polyester resin, wherein in the case where a volume average particle diameter of the toner is defined as Dv, the toner contains a group of the toner particles having 4/5 Dv, and a group of the toner particles having 6/5 Dv, and wherein an endothermic value A of the crystalline polyester resin at a first temperature increase in DSC of the toner, an endothermic value B of the crystalline polyester resin at a first temperature increase in DSC of the group of the toner particle having 4/5 Dv, and an endothermic value C of the crystalline polyester resin at a first temperature increase in DSC of the group of the toner particles having 6/5 Dv satisfy the relation represented by the following formulas: 50<(B/A)×100<90, and 110<(C/A)×100<150.

Abstract: An electrophotographic photoreceptor includes an electroconductive substrate; an undercoat layer provided on the electroconductive substrate and composed of: metal oxide fine particles including particles of at least one metal oxide and at least one organic compound provided on the particles of the at least one metal oxide as a surface treatment; and a copolymer resin synthesized by copolymerization of essential constituent monomers composed of a dicarboxylic acid, a diol, a triol and a diamine; and a photosensitive layer laminated on the undercoat layer. The undercoat layer permits (a) attaining stable electric potential characteristics in all environments ranging from low temperature and low humidity environments to high temperature and high humidity environments, (b) suppressing the occurrence of printing defects and density differences, and (c) simultaneously attaining transfer restorability and restorability from intense light-induced fatigue even in a wide variety of usages and operation environments.

Abstract: A toner for electrostatic image development containing toner matrix particles having at least a resin binder and a colorant, and an external additive, the external additive having composite oxide particles (an external additive A) that have titania and silica, wherein the external additive A has a core-shell structure in which a core portion has the titania and a shell portion has the silica, wherein the titania is present in the external additive A in an amount of from 75 to 95% by weight, and the resin binder comprising a polyester obtained by polycondensing a carboxylic acid component comprising an isophthalic acid compound and an alcohol component (a polyester A).

Abstract: A photoreceptor charge transport layer containing a spirodilactam and/or a lubricant has superior wear resistance.

Abstract: Provided are a toner containing at least a binder resin and a colorant, the toner having a specific hue angle and an absorbance at a specific wavelength in reflectance spectrophotometry, and a full-color image-forming method involving the use of the toner, the method including the steps of: forming an electrostatic image on a charged electrostatic image bearing member; developing the formed electrostatic image with the toner to form a toner image; transferring the formed toner image onto a transfer material; and fixing the transferred toner image to the transfer material to form a fixed image.

Abstract: The invention relates to an electrostatic image developing toner comprising at least one of a phthalocyanine type compound and a naphthalocyanine type compound and at least one compound represented by the following structural formulae (1) to (10): wherein R1 to R57 respectively represent a hydrogen atom, an alkyl group, an aryl group, an arylalkyl group, an amino group, a halogen group, an alkoxy group, an alkylthio group, a nitro group, a hydroxy group, a thiol group, an alkylcarbonyl group, an alkoxycarbonyl group, an alkylcarbonylamino group, an alkoxycarbonylamino group, a carboxyamide group or a nitroimino group, wherein among R1 to R57, any two adjacent Rs may form a carbon ring and any two Rs connected to the same carbon atom may form an oxo group, an imino group or a thioxo group.

Abstract: A photoconductor containing an optional supporting substrate layer, a photogenerating layer, a polyalkylene glycol benzoate containing charge transport layer, and a top overcoat layer in contact with and contiguous to the charge transport layer, and which overcoat layer includes charge transport compounds and melamine resins.

Abstract: A charge generating layer of an electrophotographic photosensitive member contains a charge generating substance, polyvinyl acetal, and a fluorenone derivative.

Abstract: Toner particles include a shell and a core, wherein the shell includes charge control agent-treated spacer particles that cause protrusions from the toner particle surface.

Abstract: To provide a carrier for an electrophotographic developer in which high image quality and full colorization are possible while carrier scattering is reduced, and a method for producing the carrier, and an electrophotographic developer including the carrier. A carrier core material for an electrophotographic developer is produced so that the half-value width B of a peak having a maximum intensity in an XRD pattern satisfies B?0.160 (degree). A carrier for an electrophotographic developer and an electrophotographic developer are produced from the carrier core material for an electrophotographic developer.

Abstract: In an electrophotographic photosensitive member having a photoconductive layer and, provided on the photoconductive layer, a surface layer constituted of a hydrogenated amorphous silicon carbide, the ratio of the number of atoms of carbon atoms (C) to the sum of the number of atoms of silicon atoms (Si) and number of atoms of carbon atoms (C), C/(Si+C), in the surface layer is from 0.61 or more to 0.75 or less, and the sum of atom density of the silicon atoms and atom density of the carbon atoms in the surface layer is 6.60×1022atom/cm3 or more.