Abstract: A method of developing a latent electrostatic image using a two-component developer system, having a ratio (Vr/Vp) ranges 1.2<(Vr/Vp)<3 where the (Vp) is a linear speed (Vp)[m/sec] of a photosensitive member and the (Vr) is a linear speed (Vr) [m/sec] of a developing sleeve, and applying a biased direct-current (VB) [by volt] wherein; a developing gap(Gp)[cm] as a distance at the nearest point between a photosensitive member and a developing sleeve is less than or equal to 0.6 mm, a ratio(&rgr;p/&rgr;a) satisfies an expression (&rgr;p/&rgr;a)<0.

Abstract: Toner formulations and developers containing the toner formulations are described. The toner contains at least one toner resin, at least one first charge control agent capable of providing a consistent level of charge, at least one second charge control agent capable of providing a sustained level of charge, at least one surface treatment agent, and at least one release agent and optionally at least one colorant. The toners of the present invention preferably provide a consistent level of charge of from about −10 to about −30 micro C/gm and also provide this level of charge for a sustained period of time, such as from about 2 to about 10 minutes. The toners of the present invention also provides excellent ruboff values for an image printed from the toners of the present invention. Methods of improving ruboff are described as well as methods to develop an image using the toner of the present invention.

Abstract: A recording liquid including a colorant and a carrier liquid including at least one of a liquid paraffin and a linear silicone oil. The recording liquid is an inkjet ink, a printing ink, a marker ink, a stencil ink, an electronic recording ink, a non-aqueous paint, a liquid developer or the like. When the recording liquid is a non-aqueous paint or a liquid developer, the recording ink further includes a resin.

Abstract: The present invention relates to a toner for developing a static latent image, wherein a smell of the toner has a cos &thgr; of from 0.990 to 0.998 as to the smell of styrene and a cos &thgr; of from 0.986 to 0.994 as to the smell of n-butyl acrylate in the smell space formed by styrene and n-butyl acrylate, and a toner for developing a static latent image, wherein a smell of the toner has a cos &thgr; of from 0.990 to 0.998 as to the smell of styrene and a cos &thgr; of from 0.991 to 0.999 as to the smell of mercaptocarboxylic acid ester in the smell space formed by styrene and mercaptocarboxylic acid ester.

Abstract: A dispersing agent for a pigment, comprising a specific compound having a structure wherein a phthalocyanine type molecular skeleton which is adsorptive on the pigment and an oligomer unit or polymer unit which prevents re-agglomeration of the pigment to bring out the effect of dispersion are covalently bonded, and having affinity for a medium or a solvent. Also disclosed are a pigment-dispersion composition containing the dispersing agent, a toner prepared using a pigment having been treated with the dispersing agent, and a process for producing such a toner.

Abstract: This invention relates to an organophotoreceptor that includes: (a) a charge transport compound having the formula  where R1 and R2 are, independently, a carbazolyl group; R3 and R4 are, independently, hydrogen, an alkyl group, an aryl group, or a heterocyclic group; and X is a sulfonyldiphenylene group; (b) a charge generating compound; and (c) an electrically conductive substrate.

Abstract: An image forming apparatus including a photoreceptor configured to bear an electrostatic latent image while rotating in a direction, wherein the photoreceptor includes an electroconductive substrate, a photosensitive layer located overlying the substrate, and a protective layer located overlying the photosensitive layer and including a filler; a latent image former configured to form the electrostatic latent image on the photoreceptor; an image developer configured to develop the electrostatic latent image with a developer including a toner; an image transfer device configured to transfer the toner image onto a receiving material; a cleaner configured to remove the toner remaining on the surface of the photoreceptor while contacting the surface of the photoreceptor; and a surface condition controller configured to control a surface condition of the photoreceptor.

Abstract: A composition comprised of resin and colorant, and wherein the colorant is stabilized with an ultra-violet stabilizer.

Abstract: Regarding the metal oxide fine powder, which is used as the additive of a powder material and is hydrophobic treated on the surface, the peak of the particle size distribution of the agglomerated particle is made to be less than the same level of average size of the powder material, so that said powder has high dispersibility in the powder material. When this metal oxide fine powder is used as the external additive, such as the toner for the electronic photograph, the standup of the electrostatic charge, the image quality, and the cleaning characteristic are improved remarkably.

Abstract: A toner for developing a static image comprising at least a resin, colorant and crystalline substance is disclosed. The toner particle has a domain-matrix structure and the domain has an average of the ratio of the major axis to the minor axis of from 1.5 to 2.5 when the domain is approximated by an ellipse.

Abstract: A charge transport layer for an imaging member comprising a charge transport material with a single carbon cored dendrimeric, star-like molecular structure not exhibiting early onset of charge transport layer fatigue cracking. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and outstanding print quality.

Abstract: An electrophotographic black toner comprising a colorant and a binder resin, wherein the toner has a metal oxide as the colorant of 20% by weight or less, said metal oxide having magnetization of 40 emu/g or smaller, and said toner has color coordinates such that L* has a value of 10 to 25, a* has a value of −3.0 to 3.0, and b* has a value of −3.0 to 3.0 as determined by a fixed image formed with the toner, as well as an electrophotographic developer and an image forming method using said electrophotographic black toner are provided. According to the present invention, the electrophotographic black toner having a high volume-specific resistance value, achieving a sufficient degree of blackness, less likely to cause high background and providing a high quality image can be obtained.

Abstract: A method of preparing an imaged element useful in lithographic printing comprises: (a) electrostatically imaging at least one surface of a substrate with a toner composition; (b) heating the imaged substrate a first time using non-contact heating to a first substrate temperature Tp; and (c) heating the imaged substrate a second time to a substrate temperature TF, wherein the method does not comprise a development step between steps (b) and (c). This method is used to obtain an imaged element with adequate fuser toning while avoiding substrate buckling and distortion.

Abstract: A positively chargeable toner for two-component development comprising a resin binder; a colorant; a releasing agent comprising a wax having a melting point of 50° to 120° C.; and an external additive comprising a positively chargeable silica, the positively chargeable silica having an absolute deviation of an error of 0.1 or less, against an approximate straight line showing an adhesion state of silicon atoms to carbon atoms, and a free ratio of 5% or less, wherein the positively chargeable toner is usable together with a ferrite carrier having a saturation magnetization of from 40 to 100 Am2/kg. This positively chargeable toner is used for development of an electrostatic latent image formed in electrophotography, electrostatic recording method, electrostatic printing method, or the like.

Abstract: In a toner production process having at least a kneading step, a pulverization step using a mechanical grinding machine, and a classification step, the grinding means comprises a mechanical grinding machine having at least a rotor which is a rotator attached to the center rotating shaft and a stator which is provided around the rotor, keeping a constant gap between the stator and the rotor surface, the grinding machine being so constructed that a circular space formed by keeping the gap stands airtight, and the surface of at least one of the rotor and the stator is coated by the plating of a chromium alloy containing at least chromium carbide.

Abstract: An organophotoreceptor comprising (a) at least one photoconductive element capable of retaining an electrophotographic latent image; (b) an electrically conductive substrate having an electrically conductive surface; (c) an electrically conductive ground stripe adjacent to the photoconductive element and in electrical contact with the electrically conductive substrate, wherein the electrically conductive ground stripe comprising a film forming binder, conductive particles, inorganic particles having a Mohs hardness greater than 5, and a surfactant; (d) at least a charge transport compound; and (e) at least a charge generating compound.

Abstract: A reactive toner that is energy-activated is printed by means of an electrographic device such as a laser printer. The reactive toner is printed onto a substrate. Toner components that cross-link and bond the printed toner permanently onto the substrate, or another substrate through a transfer process, are activated by the application of energy to react after printing. Reaction of the energy-activated components may be inhibited with blocking or protecting agents. The image is permanently bonded onto the substrate when the protection provided by the protecting agents is removed by the application of energy to the printed toner. The toner may comprise energy-activated components, colorants, color enhancing polymeric materials, binder resins, internal and external additives such as waxes and charge control agents.

Abstract: A process comprising applying a toner security mark on a document generated by xerographic means, and which mark possesses white glossy characteristics, and wherein said toner is comprised of a waterborne polymer resin and a colorant, and optionally a second security mark generated by a toner comprised of a waterborne polymer resin and a UV fluorescent component.

Abstract: An electrophotographic image forming method having cyclic steps including a charging step of charging a rotating image-bearing member to charge a surface thereof, a latent image forming steps of forming an electrostatic latent image on the charged surface of the image-bearing member, a developing step of developing the electrostatic latent image with a magnetic toner to form a toner image thereon, and a transfer step of transferring the toner image onto a recording material. In the method, the image-bearing member includes an electroconductive support, and a photoconductor layer and a surface layer formed on the support.

Abstract: A printing plate useful in lithographic printing is prepared by a process comprising: (a) applying a coating composition comprising at least one polymer such as polyethylene glycol to a substrate surface to provide the surface with a water-soluble or water-dispersible polymer coating; (b) imaging the coated substrate with a toner composition comprising toner particles by imagewise applying the toner composition to the polymer coating, wherein the polymer coating has a softening temperature TS; (c) heating the imaged substrate to a temperature TF which is equal to or greater than TS; and (d) contacting the imaged substrate with a solution capable of removing the non-imaged portion of the polymer coating, wherein the process does not comprise a chemical development step and the polymer coating has a coating weight of about 0.25 to about 2.0 g/m2.