Abstract: The magnetic toner contains a magnetic toner particle having a binder resin and a magnetic body, and inorganic fine particles, wherein the average circularity of the magnetic toner is at least 0.955 and, when classifying the inorganic fine particles, in accordance with the fixing strength thereof to the magnetic toner particle and in the sequence of the weakness of the fixing strength, as first inorganic fine particles, second inorganic fine particles, and third inorganic fine particles, the content of the first inorganic fine particles, the ratio of the second inorganic fine particles to the first inorganic fine particles, and the coverage ratio X are in prescribed ranges.

Abstract: To provide a crosslinked polyester resin by using environmentally friendly and low-cost raw materials while reducing the content of a bisphenol A-derived component. [Subject Matter] [Solutions] To provide a polyester resin containing a trivalent or higher acid-derived component and a bisphenol A-alkylene oxide adduct-derived component. In such a polyester resin, the bisphenol A-alkylene oxide adduct-derived component is contained at 0.01˜0.35 mol relative to 1 mol of all the acid-derived components, and the ratio of acid value (mg KOH/g) to hydroxyl value (mg KOH/g) is set to be 1:3˜1:26.

Abstract: A cold brewing coffee device that produces coffee without any suspended solids in the product. The devices uses a false bottom in the initial tank to hold the coffee beans and water is pumped between the initial tank and a second tank. Using an inverted P trap in the piping allow for reduced suspended solids in the final product. The end product is a high quality cold brewed beverage that is defined by the beverages clarity and lack of visible suspended solids, wherein the resulting product has a distinct look compared to other brewed beverages (i.e. producing a product that is cleaner than competing products without the need for a filter).

Abstract: A pour-over coffee brewer apparatus comprises a base containing a motor that drives a coffee grinder via a set of gear assemblies, a vertical support structure extending upwards from a rear portion of the base, and a horizontal support structure extending out from a top portion of the vertical support structure, the horizontal support structure comprising a grinder for grinding coffee beans and a water dispenser for dispensing water onto ground coffee beans. The set of gear assemblies comprises a first gear assembly in the base, a second gear assembly in the horizontal support structure, and a gear shaft in the vertical support structure that couples the first gear assembly and the second gear assembly.

Abstract: A toner for electrostatic image development includes toner particles; and an external additive containing silica particles and polytetrafluorethylene particles, the silica particles having a compression-aggregation degree of 60% or more and 95% or less and a particle compression ratio of 0.20 or more and 0.40 or less.

Abstract: A toner comprising a binder resin, a crystalline material, and a colorant, wherein, in a cross section image of the toner, when R (?m) is a long axis of the toner, r (?m) is a long axis of a crystalline material domain, domain A is a domain satisfying formula (ii), and domain B is a domain satisfying formula (iii), the toner in which the domain A and the domain B are both present is at least 50 number %; an number average diameter RAvg of the long axis of the toner satisfies formula (i); and a number of domain B per toner cross section of one toner is 20 to 300. 4 ?m?RAvg?12 ?m??(i) 0.125?r/R?0.375??(ii) 0.000625?r/R?0.

Abstract: The present invention provides a compound capable of improving the dispersibility of color pigments in a water-insoluble solvent; and a pigment-dispersing agent. The present invention also provides a pigment composition, a pigment dispersion, and a toner, which have satisfactory tinting strength. The present invention provides the compound containing a polymer having a monomer unit having a specific chemical structure, the compound having a moiety also having a specific structure.

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: Provided is a method of forming an electrophotographic image using a plurality of color toners, the method containing: a charging step; an exposing step; a developing step; and a transferring step, wherein the plurality of color toners each respectively contain toner particles including a binder resin, a coloring agent, a releasing agent, and a crystalline resin; the binder resin contains an amorphous vinyl polymer formed with a vinyl monomer; the toner particles contain the amorphous vinyl polymer in the range of 10 to 90 mass %; and a maximum value of an acid value difference of the color toners is in the range of 1 to 10 mg KOH/g.

Abstract: Provided is a method of preparing a poly-silicic-ferric coagulant (PSFC) having a controlled aggregating strength. In particular, according to an embodiment, provided is a method of preparing a PSFC that may effectively suppress both formation of fine toner particles having a particle size that is smaller than a desired particle size and formation of coarse toner particles having a particle size that is greater than the desired particle size, wherein the PSFC for a toner is used in preparation of a toner by using an emulsion aggregation (EA) method. The PSFC for a toner prepared by using the method, according to an embodiment, significantly exhibits a controlled aggregating strength, and thus a viscosity of an emulsion aggregation solution for the toner preparation is appropriate, which results in suppressing production of fine toner particles and coarse toner particles. In this regard, a toner preparation yield may improve.

Abstract: A toner according to an embodiment includes a colorant, a binder resin, and an ester wax. The colorant, the binder resin and the ester wax form a toner particle. The ester wax contains two or more ester compounds represented by the general formula R1COOR2, where R1 and R2 each independently is an alkyl group. The total number of carbon atoms of R1 and R2 is in a range from 31 to 53. The two or more ester compounds have different number of carbon atoms from each other.

Abstract: A toner having a toner particle which contains a binder resin, a fatty acid metal salt, and a resin having an ionic functional group, in which the fatty acid metal salt is a fatty acid metal salt of a polyvalent metal with valency of 2 or higher and a fatty acid with carbon atom number of at least 8 and not more than 28, and the acid dissociation constant pKa of the resin having an ionic functional group is at least 6.0 and not more than 9.0.

Abstract: The object of the present invention is to provide a toner for development of electrostatic images (hereinafter referred to as toner) which, while preventing dust during fixation, secures improved hot offset resistance and is excellent in providing good image quality. The invention relates to the toner that comprises a binder resin, a colorant and a wax, wherein the wax has, while in a state of being contained in the toner, a melting point of from 55° C. to 90° C., and the value Dt of the toner satisfies a specific formula.

Abstract: An image forming apparatus includes a developing unit that contains an electrostatic charge image developer which contains a carrier and an electrostatic charge image developing toner, wherein the toner includes toner particles which contain a polyester resin, which is a polycondensate of a polycarboxylic acid and a polyol, and has a glass transition temperature of 50° C. to 70° C., the polyol includes a polyol not having a bisphenol A structure in a range of 50% by weight to 100% by weight, and a melt viscosity A of the toner at 110° C. after storage for 2 hours under the environment of absolute humidity of 82.7 (g/m3) and a melt viscosity B of the toner at 110° C. after storage for 2 hours under the environment of absolute humidity of 16.5 (g/m3) each are in the ranges specified in the specification.

Abstract: A toner, including: a binder resin; and calcium carbonate, wherein the toner has a molecular weight distribution having a main peak in a range of 1,000 to 10,000, and a half value width of the main peak is 8,000 to 30,000, where the molecular weight distribution is obtained by GPC (gel permeation chromatography) of THF soluble matter of the toner, and wherein the toner contains the calcium carbonate in an amount of 5% by mass to 35% by mass.

Abstract: Provided is a toner, including a toner particle containing: a binder resin containing a styrene acrylic resin as a main component, a colorant, a hydrocarbon wax, and a wax dispersant, in which: the wax dispersant includes a polymer of a vinyl resin component and a hydrocarbon compound, the vinyl resin component including styrene and one or more kinds of vinyl-based polymerizable monomers except a styrene derivative; and a solubility parameter of the binder resin (A) a solubility parameter of the vinyl resin segment of the wax dispersant (C), and a solubility parameter of the hydrocarbon compound segment of the wax dispersant (D) satisfy the formulae (1) and (2). |A?C|?0.20??(1) C?D<1.

Abstract: A toner comprising: a toner particle containing a binder resin and a colorant, and an inorganic fine particle A and B present on the surface of the toner particle, wherein the inorganic fine particle A is a silica fine particle having a number-average particle diameter (D1) of primary particles in a specific range, the inorganic fine particle B has a number-average particle diameter (D1) of primary particles in a specific range, and is at least one fine particle selected from a group consisting of a silica fine particle, a titanium oxide fine particle, and an alumina fine particle, A total fixing ratio of the inorganic fine particle A and B is 75% or more, and an inter-particle force Fp(A) and an inter-particle force Fp(B) are within specific numerical ranges and satisfy a specific relationship.

Abstract: A unit for an image forming apparatus includes an electrophotographic photoreceptor that includes a conductive substrate, a photosensitive layer provided on the conductive substrate, and a surface layer provided so as to contact with an outermost surface of the photosensitive layer, and an exposure section that exposes the electrophotographic photoreceptor with a light having a wavelength (?) (nm) so as to form an electrostatic latent image on a charged surface of the electrophotographic photoreceptor, wherein a surface roughness (Rz1) (nm) of the outermost surface of the photosensitive layer satisfies an expression of [(Rz1)?(?)/(4×(n2))] where a refractive index of the surface layer is set as (n2), and an outermost surface of the surface layer has a surface shape different from the outermost surface of the photosensitive layer.

Abstract: An electrostatic charge image developing toner set includes an electrostatic charge image developing black toner that includes black toner particles including a black colorant, a binder resin, and a release agent, and inorganic particles having an average particle diameter of 50 nm to 300 nm; and an electrostatic charge image developing color toner that includes color toner particles including a color colorant, a binder resin, and a release agent, and inorganic particles having an average particle diameter of 50 nm to 300 nm, wherein a proportion of the release agent exposed to a surface of the color toner particles is greater than a proportion of the release agent exposed to a surface of the black toner particles.

Abstract: A cylindrical member used in an electrophotographic photoconductor, the cylindrical member includes an impact-pressed cylindrical body containing aluminum and a long-chain fatty acid ester based lubricant that is present on the outer surface of the impact-pressed cylindrical body in an amount of approximately not more than 5.0×10?3 mg/cm2.