Abstract: A high opacity white ink containing a mica-based mineral with titania is provided. A method of manufacturing the high opacity white ink is also provided.

Abstract: A method for producing a toner for electrostatic image development containing at least an amorphous polyester and a crystalline polylactic acid, including step 1: mixing an amorphous polyester and a crystalline polylactic acid at a temperature of from 140° to 250° C.; step 2: melt-kneading a mixture obtained in the step 1; and step 3: pulverizing and classifying a melt-kneaded product obtained in the step 2; and a toner for electrostatic image development obtainable by the method. The toner for electrostatic image development obtainable by the method of the present invention is suitably used in development or the like of latent images formed in an electrostatic development method, an electrostatic recording method, an electrostatic printing method, or the like.

Abstract: An electrostatic latent image developing toner includes toner particles containing a binder resin and at least one type of wax. A dispersed-phase diameter distribution of the wax has a peak at a dispersed-phase diameter in a range from 0.04 ?m to 0.20 ?m and a peak at a dispersed-phase diameter in a range from 1.0 ?m to 5.0 ?m. The wax includes first wax particles each having a dispersed-phase diameter in the range from 0.04 ?m to 0.20 ?m and second wax particles each having a dispersed-phase diameter in the range from 1.0 ?m to 5.0 ?m. A volume ratio of the first wax particles relative to the second wax particles is at least 0.5 and no greater than 1.5.

Abstract: The present invention relates to an image forming method using a yellow toner, a magenta toner, and a cyan toner, in which the yellow toner, the magenta toner, and the cyan toner respectively contain toner base particles containing a binder resin containing an amorphous polyester resin as a main component and a crystalline resin, aluminum, and a colorant, and the concentration of aluminum in the toner base particles of the yellow toner measured by high-frequency inductively coupled plasma emission spectral analysis satisfies a specific relation. According to the present invention, an image forming method and a toner set which can improve the thin paper separation property while maintaining favorable low temperature fixability are provided.

Abstract: A toner according to the present invention includes a plurality of toner particles each including a toner core and a shell layer disposed over a surface of the toner core. The shell layer contains a thermosetting resin. A ratio G*1/G*2 of complex modulus G*1 at 120° C. of a pellet formed using the toner relative to complex modulus G*2 at 120° C. of the toner is at least 2.0 and no greater than 3.0. The pellet is obtained by forming the toner into a size of 0.5 mm in thickness and 10 mm in diameter under forming conditions of 25° C. and 50 kg·f/cm2.

Abstract: An electrophotographic photoreceptor having excellent cleaning performance and high durability for a long time and an electrophotographic imaging apparatus employing the electrophotographic photoreceptor are provided. The electrophotographic photoreceptor includes a photosensitive layer and a protective layer sequentially formed in this stated order on a conductive support. The protective layer includes a metal oxide surface-treated with a phosphorous-containing compound, wherein the metal oxide includes at least one selected from a group consisting of tin oxide, zinc oxide, and titanium oxide. The phosphorous-containing compound is a polymer including a phosphorus-oxoacid moiety reacting with the metal oxide, a photo-reactive moiety, and a lubricative moiety including at least one selected from a group consisting of fluorine and silicon at side chains.

Abstract: An electrophotographic photosensitive member includes a photosensitive layer. The photosensitive layer contains a charge generating material and a hole transport material represented by general formula (1) shown below in a single layer. Titanyl phthalocyanine contained as the charge generating material exhibits a main peak at a Bragg angle 2?±0.2°=27.2° in a CuK? characteristic X-ray diffraction spectrum and satisfies either (B) or (C), shown below, in a differential scanning calorimetry spectrum. (B) A peak is not present in a range from 50° C. to 400° C., other than a peak resulting from vaporization of adsorbed water. (C) A peak is not present in a range from 50° C. to 270° C., other than a peak resulting from vaporization of adsorbed water, and a peak is present in a range from 270° C. to 400° C.

Abstract: A polyester resin for toner includes a repeating unit that is derived from a diol represented by the following formula (1), and a repeating unit that is derived from a dicarboxylic acid not having a double carbon-carbon bond: wherein R1 and R2 each independently represents hydrogen or a methyl group, L1 represents a divalent linking group selected from the group consisting of an ether group, a chain alkylene group, a cyclic alkylene group, and combinations thereof, L2 and L3 each independently represent a divalent linking group selected from the group consisting of a carbonyl group, an ester group, an ether group, a sulfonyl group, a chain alkylene group, a cyclic alkylene group, an arylene group, and combinations thereof, L1 and L2, or L1 and L3 may form a ring, and A1 and A2 each independently represent a rosin ester group derived from a hydrogenated rosin.

Abstract: There is provided with toner including one or more kinds of brilliant pigments, and one or more kinds of coloring matters. There are also provided with a toner cartridge including the toner, a developing unit including a storing portion that stores the toner, and an image forming apparatus including a storing portion that stores the toner.

Abstract: A diamine compound is represented by general formula (1). In the general formula (1), R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 each represent, independently of one another, a hydrogen atom, a halogen atom, an optionally substituted alkyl group having a carbon number of at least 1 and no greater than 6, an optionally substituted alkoxy group having a carbon number of at least 1 and no greater than 6, or an optionally substituted aryl group having a carbon number of at least 6 and no greater than 14. m represents an integer of at least 1 and no greater than 3. n represents an integer of at least 0 and no greater than 2.

Abstract: The present invention is to provide a toner which is able to prevent an odor generated from the toner upon fixing and which has excellent fixability. The present invention is also to provide a method for producing the toner. Disclosed is a method for producing a toner for developing electrostatic images, wherein a content of diethylbenzene in colored resin particles after a polymerization step and before a stripping step, is set to 100 to 400 ppm by the polymerization step; and wherein the diethylbenzene content in the colored resin particles after the stripping step is set to 30 to 250 ppm by the stripping step, and a content of the monovinyl monomer in the colored resin particles after the stripping step is set to 30 ppm or less by the stripping step.

Abstract: An electrostatic charge image developing toner includes a toner particle which has a sea portion containing a binder resin and an island portion containing a release agent, wherein a melt viscosity at 100° C. of the toner is from 4,000 to 200,000 Pa·s, a flow activation energy of the toner is 18,000 to 80,000 J·mol?1, a maximum frequent value in distribution of eccentricity B of the island portion is from 0.75 to 0.98, a skewness in the distribution of the eccentricity B is from ?1.10 to ?0.50, and the eccentricity B is expressed by 2d/D, wherein D indicates an equivalent circle diameter (?m) of the toner in an observation of a cross-section of the toner, and d indicates a distance (?m) from a centroid of the toner to a centroid of the island portion containing the release agent in the observation of a cross-section of the toner.

Abstract: A method for producing a toner for electrostatic image development containing at least an amorphous polyester and a crystalline polylactic acid, including step 1: mixing an amorphous polyester and a crystalline polylactic acid at a temperature of from 140° to 250° C.; step 2: melt-kneading a mixture obtained in the step 1; and step 3: pulverizing and classifying a melt-kneaded product obtained in the step 2; and a toner for electrostatic image development obtainable by the method. The toner for electrostatic image development obtainable by the method of the present invention is suitably used in development or the like of latent images formed in an electrostatic development method, an electrostatic recording method, an electrostatic printing method, or the like.

Abstract: An electrophotographic photoconductor including a support, an undercoat layer overlying the support, and a photosensitive layer overlying the undercoat layer is provided. The undercoat layer includes zinc oxide particles and a binder resin. The undercoat layer has a voltage (V)-current (I) characteristics such that, when S1 is a value obtained by integrating current (I [A]) in terms of voltage (V [V]) from 0 to a distribution voltage VUL [V] distributed to the undercoat layer, and S2 is a value obtained by integrating a line connecting two points at a voltage (V [V]) of 0 and the distribution voltage VUL [V] in terms of voltage (V [V]) from 0 to the distribution voltage VUL [V], S1 is within a range of from 1.0×10?4 to 1.0×10?2 and a ratio (S1/S2) of S1 to S2 is 0.50 or less.

Abstract: A chemically prepared toner composition according to one example embodiment includes a core including a first polymer binder, a second polymer binder, a colorant and a release agent; a shell that is formed around the core and includes a third polymer binder; and a borax coupling agent between the core and the shell. The first and third polymer binders are different amorphous polyester resins. The second polymer binder is a crystalline polyester resin and acts as a plasticizing agent in the core. The borax coupling agent assists in adhering the shell to the outer surface of the core. Optionally, the toner of the present invention may be finished with a set of extra particulate additives.

Abstract: An electrostatic charge image developing toner includes a toner particle that has a sea-island structure including a sea portion containing a binder resin and an island portion containing a release agent and having at least two maximum values of distribution of a degree of uneven distribution B of the island portion shown by the following Equation (1): degree of uneven distribution B=2d/D??Equation (1) in Equation (1), D represents an equivalent circle diameter (?m) of the toner particle obtained by cross section observation of the toner particle, and d represents a distance (?m) between the center of gravity of the toner particle and the center of gravity of the island portion containing the release agent obtained by cross section observation of the toner particle.

Abstract: Provided are an asymmetric butadiene-based charge transporting compound represented by one of Formula (1) and (1?) as in claim 1, an electrophotographic photoreceptor including the asymmetric butadiene-based charge transporting compound, and an electrophotographic imaging apparatus. The electrophotographic photoreceptor including the organic photoconductive material as a charge transporting material may not cause a problem, such as partial crystallization during film formation and may have a high charge potential, a sufficient photoresponsive property with high sensitivity, and a high durability. Moreover, these properties may be all maintained even in the case of exposure to light as well as use in low-temperature environments or high-speed processes, thus having high reliability.

Abstract: Toner containing toner particles having a resin component, in which the resin component has an olefin-based copolymer and a crystalline polyester resin, the olefin-based copolymer has a unit Y1 represented by Formula (1) and at least one kind of unit Y2 selected from the group consisting of a unit represented by Formula (2) and a unit represented by Formula (3), a content of the olefin-based copolymer contained in the resin component is 50% by mass or more based on a total mass of the resin component, a content of the unit Y2 is 3% by mass or more and 35% by mass or less based on a total mass of the olefin-based copolymer, and a melt flow rate of the olefin-based copolymer is 30 g/10 min or less.

Abstract: The magnetic toner includes magnetic toner particles comprising a binder resin and a magnetic body and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles comprise metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, wherein; when a coverage ratio A (%) is a coverage ratio of the magnetic toner particle's surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles that are fixed to the magnetic toner particle's surface, the magnetic toner has a coverage ratio A, a coefficient of variation on th

Abstract: A toner having a toner particle including a binder resin, wherein the binder resin includes a styrene acrylic resin and a vinyl-modified crystalline polyester resin, the vinyl-modified crystalline polyester resin has a crystalline polyester segment having structures of following i) or a structure of following ii), i) at least two structures selected from the group consisting of a structure derived from an aliphatic dicarboxylic acid, a structure derived from an aliphatic diol and a structure derived from an aliphatic hydroxycarboxylic acid; ii) a structure derived from an aliphatic hydroxycarboxylic acid; and the vinyl-modified crystalline polyester resin has a specific modification rate.