Abstract: Provided is a toner including a binder resin and a colorant, wherein the colorant includes Solvent Red 49, and an acid value of the toner is 9.0 mgKOH/g or greater but 30.0 mgKOH/g or less.

Abstract: An image forming apparatus including an image forming unit, a fixing device, and circuitry is provided. The image forming unit is configured to perform a special image forming operation that forms a color toner image and a special toner image with a color toner and a special toner, respectively, on a recording medium and a normal image forming operation that forms the color toner image without forming the special toner image on the recording medium. The fixing device is configured to fix the color toner image and the special toner image on the recording medium. The circuitry is configured to perform, in the special image forming operation, a toner amount suppression control that makes an amount of the color toner on the recording medium per unit area smaller than that in the normal image forming operation.

Abstract: Provided is a toner including toner particles, each toner particle includes: a base particle including a binder resin; and external additive particles, wherein the external additive particles include particles each having an equivalent circle diameter of 10 nm or greater, a volume average particle diameter of the particles each having an equivalent circle diameter of 10 nm or greater is 80 nm or greater but 140 nm or less, and a ratio (circumscribed circle area/particle area) of a circumscribed circle area of the particle having an equivalent circle diameter of 10 nm or greater to a particle area of the particle having an equivalent circle diameter of 10 nm or greater is 1.60 or greater but 2.60 or less.

Abstract: Provided is a toner including a binder resin and a colorant, wherein the colorant includes Solvent Red 49, and an acid value of the toner is 9.0 mgKOH/g or greater but 30.0 mgKOH/g or less.

Abstract: A toner is provided. The toner comprises a maleic-acid-modified polyolefin having a polypropylene block in a main chain and having a weight average molecular weight of 60,000 or more.

Abstract: An image forming apparatus including an image forming unit, a fixing device, and circuitry is provided. The image forming unit is configured to perform a special image forming operation that forms a color toner image and a special toner image with a color toner and a special toner, respectively, on a recording medium and a normal image forming operation that forms the color toner image without forming the special toner image on the recording medium. The fixing device is configured to fix the color toner image and the special toner image on the recording medium. The circuitry is configured to perform, in the special image forming operation, a toner amount suppression control that makes an amount of the color toner on the recording medium per unit area smaller than that in the normal image forming operation.

Abstract: Provided is a method for forming a flying body using optical vortex laser, the method including irradiating an opposite surface of a base to a surface of the base, on which a light-absorbing material is disposed, with an optical vortex laser beam to generate a liquid column or liquid droplet having a diameter smaller than an irradiation diameter of the optical vortex laser beam from the light-absorbing material in an irradiation direction of the optical vortex laser beam.

Abstract: A method for preparing a measurement sample for MALDI mass spectrometry, the method including applying a laser beam to a base containing a matrix disposed on a surface of the base, in a manner that the laser beam is applied to a surface of the base opposite to the surface on which the matrix is disposed, to make the matrix fly from the base to be disposed at a predetermined position of an analyte of MALDI mass spectrometry.

Abstract: An image forming apparatus including an image forming unit, a fixing device, and circuitry is provided. The image forming unit is configured to perform a special image forming operation that forms a color toner image and a special toner image with a color toner and a special toner, respectively, on a recording medium and a normal image forming operation that forms the color toner image without forming the special toner image on the recording medium. The fixing device is configured to fix the color toner image and the special toner image on the recording medium. The circuitry is configured to perform, in the special image forming operation, a toner amount suppression control that makes an amount of the color toner on the recording medium per unit area smaller than that in the normal image forming operation.

Abstract: A toner set including a color toner including a binder resin and a colorant, and an invisible toner including a binder resin and a near infrared light-absorbing material, wherein 60-degree glossiness of a solid image of the invisible toner is 30 or greater, and the 60-degree glossiness of the solid image of the invisible toner is higher than 60-degree glossiness of a solid image of the color toner by 10 or greater.

Abstract: A toner is provided. The toner includes at least two types of polyester resins and a release agent. When the toner is subjected to a dynamic viscoelasticity measurement at a frequency of 6.28 rad/sec to obtain a temperature-dependent curve of loss tangent (tan ?), and the temperature-dependent curve is differentiated one time with temperature, a resulting curve has a maximum value of 0.07 or more and a minimum value of 0.025 or less within a temperature range of from 85° C. to 110° C. When the toner is subjected to a differential scanning calorimetry (DSC), an endothermic amount measured in a first temperature rising in the DSC is 3.5 J/g or less within a temperature range of from 85° C. to 120° C.

Abstract: A toner comprising a binder resin and a near-infrared light absorbing material is provided. The toner in the form of a pellet has: a chroma C* of 20 or less in the L*C*h color space; a hue angle h of from 50 to 90 degrees in the L*C*h color space; and a spectral reflectance of 5% or less at a wavelength of from 800 to 900 nm.

Abstract: A method for forming an image, the method including forming an image by irradiating an ink that absorbs light with a laser beam that has a wavelength corresponding to a light absorption wavelength of the ink to fly the ink by an energy of the laser beam in a direction in which the laser beam is emitted, to attach the ink on an attachment target.

Abstract: A toner is provided. The toner comprises mother particles and an external additive covering the mother particles. The mother particles comprise a binder resin, and the external additive comprises inorganic particles. The inorganic particles comprise small-size inorganic particles having an equivalent circle diameter of from 30 to 70 nm and large-size inorganic particles having an equivalent circle diameter of from 150 to 200 nm and a circularity of 0.85 or more. The large-size inorganic particles are 20 to 70 in number per 100 ?m2 image area of the toner observed with a field-emission scanning electron microscope.

Abstract: A toner, where a diffraction peak of the toner as measured by X-ray diffraction spectroscopy is present at least in a region where 2? is from 20° through 25°, and a difference between Tg1 and Tg2 is 10° C. or less, where Tg1 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of a differential scanning calorimeter (DSC) under the heating and cooling conditions 1 defined in the specification, and Tg2 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of the differential scanning calorimeter (DSC) under the heating and cooling conditions 2 defined in the specification.

Abstract: A toner set for use in an image forming apparatus is provided. The toner set includes a fluorescent toner and a color toner. The fluorescent toner comprises a binder resin and a fluorescent agent. The color toner comprises a binder resin and a colorant. A 60-degree gloss value (Gf) of a solid image of the fluorescent toner is in a range of from 10 to 25, and a difference (Gn?Gf) between a 60-degree gloss value (Gn) of a solid image of the color toner and the 60-degree gloss value (Gf) of the solid image of the fluorescent toner is in a range of from 10 to 28.

Abstract: A toner comprising a binder resin and a near-infrared light absorbing material is provided. The toner in the form of a pellet has: a chroma C* of 20 or less in the L*C*h color space; a hue angle h of from 50 to 90 degrees in the L*C*h color space; and a spectral reflectance of 5% or less at a wavelength of from 800 to 900 nm.

Abstract: A toner is provided. The toner comprises a binder resin comprising a polyester resin, a release agent comprising an ester wax, and a wax dispersing agent comprising a hybrid resin. The hybrid resin comprises a condensation polymerization resin unit and an addition polymerization resin unit. The condensation polymerization resin unit comprises a condensation polymerization product of an aromatic alcohol component and a carboxylic acid component, and the carboxylic acid component comprises an aliphatic dicarboxylic acid having 9 to 14 carbon atoms. The addition polymerization resin unit comprises an addition polymerization product of a styrene monomer.

Abstract: A toner includes a europium complex represented by the following Chemical formula where A represents 2-naphthyl group, 2-naphthyl group having a substitution group selected from the group consisting of an alkyl group, an alkoxy group, and a halogen, R represents a fluoroalkyl group having one to three carbon atoms or a methyl group, and R1, R2, R3, and R4 each, independently represent hydrogen atoms, alkyl groups, or aryl groups, wherein the toner has a hydroxyl value of from 20 to 40 mgKOH/g.

Abstract: Provided is a light-absorbing material flying apparatus including: a light-absorbing material that absorbs light; and a light-absorbing material flying section configured to irradiate the light-absorbing material with an optical vortex laser beam corresponding to a light absorption wavelength of the light-absorbing material to fly the light-absorbing material by an energy of the optical vortex laser beam in a direction in which the optical vortex laser beam is emitted to attach the light-absorbing material on an attachment target.