Abstract: A toner for developing an electrostatic charge image incorporates toner particles that contain binder resins including an amorphous polyester resin and a crystalline polyester resin, an ester-based release agent, and a polycondensate of a styrene-acrylic resin and a polyolefin resin. The polycondensate of styrene-acrylic and polyolefin resins has a storage modulus G?SP (70) at 70° C. of 1×104 Pa or more and 1×107 Pa or less and a storage modulus G?SP (90) at 90° C. of 1×103 Pa or more and 1×106 Pa or less in dynamic rheometry. The toner particles have a storage modulus G?T (70) at 70° C. of 1×104 Pa or more and 1×106 Pa or less and a storage modulus G?T (90) at 90° C. of 1×103 Pa or more and 1×105 Pa or less in dynamic rheometry.

Abstract: A toner for developing an electrostatic charge image incorporates toner particles that contain binder resins, in which: the binder resins include amorphous resins and at least one crystalline resin, the amorphous resins including amorphous resin a1 and amorphous resin a2, the crystalline resin including crystalline resin cl; and 10,000?Mw(a2)?Mw(a1)?150,000??(1), and |SP(a1)?SP(c1)|/|SP(a2)?SP(c1)|?0.9??(2), where Mw (al) is the weight-average molecular weight of amorphous resin a1, Mw (a2) is that of amorphous resin a2, SP (a1) is the solubility parameter (SP) of amorphous resin a1, SP (a2) is that of amorphous resin a2, and SP (c1) is that of crystalline resin c1.

Abstract: A toner for developing an electrostatic charge image contains toner particles including first toner particles and second toner particles, the first toner particles having a brightness of less than 90 and the second toner particles having a brightness of 90 or more. The second toner particles constitute 0.1% by number or more and 10% by number or less of the toner particles, and, in the size distribution of the second toner particles, toner particles having a diameter equal to or smaller than the number-average diameter Dn of the toner particles constitute 70% by number or more.

Abstract: An irregular shape inorganic particle satisfies the following formulas (1) and (2), 1/17?A/B? 1/13??(1) 1.2?C/D?1.5??(2) wherein A represents a distance between the center of a circumscribed rectangle, in which lines sandwiching a projected image and being parallel to an absolute maximum length of the projected image of inorganic fine particles are long sides and lines sandwiching the projected image and being perpendicular to the absolute maximum length are short sides, and the center of gravity of the projected image, B represents the absolute maximum length, C represents a length of a long side of the circumscribed rectangle, and D represents a length of a short side of the circumscribed rectangle.

Abstract: An irregular shape inorganic particle satisfies the following formulas (1) and (2), 1/17?A/B? 1/13??(1) 1.2?C/D?1.5??(2) wherein A represents a distance between the center of a circumscribed rectangle, in which lines sandwiching a projected image and being parallel to an absolute maximum length of the projected image of inorganic fine particles are long sides and lines sandwiching the projected image and being perpendicular to the absolute maximum length are short sides, and the center of gravity of the projected image, B represents the absolute maximum length, C represents a length of a long side of the circumscribed rectangle, and D represents a length of a short side of the circumscribed rectangle.

Abstract: An electrostatic charge image developing toner includes toner particles that contain a colorant, a binder resin and a release agent, and an external additive, in which the external additive contains inorganic particles including an aliphatic alcohol having 5 or more carbon atoms and a melting point of 20° C. or lower on the surfaces thereof.

Abstract: An electrostatic charge image developing toner includes toner particles, and an external additive containing titanate compound particles having an iron content of from greater than 1200 ppm to 6000 ppm.

Abstract: The toner for developing an electrostatic charge image includes toner particles containing a colorant, a binder resin, and a release agent, and an external additive, wherein the external additive contains inorganic particles having fluorine atom-containing oil on the hydrophobization-treated surfaces.

Abstract: An electrostatic charge image developing toner includes toner particles, and an external additive containing titanate compound particles having an iron content of from greater than 1200 ppm to 6000 ppm.

Abstract: An electrostatic charge image developing toner including toner particles containing a colorant, a binder resin and a release agent; and an external additive, in which the external additive contains inorganic particles having hydrocarbon oil that contains a saturated hydrocarbon having a ring structure on the surfaces thereof.

Abstract: An electrostatic charge image developing toner includes toner particles containing a colorant, a binder resin, and a release agent and an external additive, in which the external additive contains inorganic particles which include saturated hydrocarbons having from 9 to 35 carbon atoms on the surfaces thereof.

Abstract: An electrostatic charge image developing toner includes toner particles containing a colorant, a binder resin, and a release agent; and an external additive, wherein the external additive contains inorganic particles which include a compound represented by Formula (1) below on the surfaces thereof: wherein in Formula (1), R1 and R8 each independently represents an alkyl group, R2 to R7 each independently represents an alkyl group or a substituted or unsubstituted phenyl group, and at least three groups of R2 to R7 each independently represents a substituted or unsubstituted phenyl group.

Abstract: An electrostatic charge image developing toner includes toner particles that contain a colorant, a binder resin and a release agent, and an external additive, in which the external additive contains inorganic particles including an aliphatic alcohol having 5 or more carbon atoms and a melting point of 20° C. or lower on the surfaces thereof.

Abstract: An electrostatic charge image developing toner includes toner particles containing a colorant, a binder resin, and a release agent; and an external additive, wherein the external additive contains inorganic particles which include a compound represented by Formula (1) below on the surfaces thereof: wherein in Formula (1), R1 and R8 each independently represents an alkyl group, R2 to R7 each independently represents an alkyl group or a substituted or unsubstituted phenyl group, and at least three groups of R2 to R7 each independently represents a substituted or unsubstituted phenyl group.

Abstract: The toner for developing an electrostatic charge image includes toner particles containing a colorant, a binder resin, and a release agent, and an external additive, wherein the external additive contains inorganic particles having fluorine atom-containing oil on the hydrophobization-treated surfaces.

Abstract: An electrostatic charge image developing toner including toner particles containing a colorant, a binder resin and a release agent; and an external additive, in which the external additive contains inorganic particles having hydrocarbon oil that contains a saturated hydrocarbon having a ring structure on the surfaces thereof.

Abstract: An electrostatic charge image developing toner includes toner particles containing a colorant, a binder resin, and a release agent and an external additive, in which the external additive contains inorganic particles which include saturated hydrocarbons having from 9 to 35 carbon atoms on the surfaces thereof.

Abstract: The invention provides a toner for electrostatic image development having at least a binder resin and a colorant and having an existence ratio of an IA Group element, from which hydrogen is excluded, measured by XPS (X-ray Photoelectron Spectroscopy) in a range of about 0.03 to 1.0 atom % and a total of existence ratios of an IIA Group element, an IIIB Group element and an IVB Group element, from which carbon is excluded, measured by XPS in a range of about 0.05 to 2.0 atom %. The invention further provides an electrostatic image developer having at least a carrier and the toner, and an image forming method including at least developing an electrostatic latent image with a developer containing at least the toner to form a toner image.

Abstract: An electrostatic latent image developing magenta toner includes at least quinacridone pigment, naphthol pigment, and a release agent. Colorant of the toner satisfies conditions (a) and (b): (a) an average primary particle size D50 of a quinacridone pigment represented by formula (1) and an average primary particle size D50 of a naphthol pigment represented by formula (2) are such that the average primary particle size D50 of the quinacridone pigment is smaller than the average primary particle size D50 of the naphthol pigment; and (b) the average primary particle size D50 of the quinacridone pigment is greater than 20 nm, and the average primary particle size D50 of the naphthol pigment is smaller than 200 nm. Formula (1): Here, each of R1, R2, R3, and R4 is selected from the group consisting of H, CH3, and Cl, R1 and R2 are different from each other, and R3 and R4 are different from each other.

Abstract: The invention provides a toner for electrostatic image development having at least a binder resin and a colorant and having an existence ratio of an IA Group element, from which hydrogen is excluded, measured by XPS (X-ray Photoelectron Spectroscopy) in a range of about 0.03 to 1.0 atom % and a total of existence ratios of an IIA Group element, an IIIB Group element and an IVB Group element, from which carbon is excluded, measured by by XPS in a range of about 0.05 to 2.0 atom %. The invention further provides an electrostatic image developer having at least a carrier and the toner, and an image forming method including at least developing an electrostatic latent image with a developer containing at least the toner to form a toner image.