Abstract: A toner comprising a toner particle comprising: a toner base particle; and an organosilicon polymer at a surface of the toner base particle, wherein protruded portions constituted from the organosilicon polymer are present at the surface of the toner base particle, when a specific reciprocating shaking test is carried out, the toner particle is measured in terms of a total area S of a surface of the toner particle and an area Sc of regions of the surface of the toner base particle coated with the organosilicon polymer at the surface of the toner particle before and after the test, values of Sc/S for the toner particle before and after the test are respectively defined as R0 and R1, the value of R0 is 0.30 to 0.70, a value of (R0?R1)/R0 is 0.20 or less, and a storage elastic modulus at 100° C. of the toner is 8000 to 50,000 Pa.

Abstract: A toner comprising a toner particle comprising: a toner base particle comprising a binder resin; and an organosilicon polymer at a surface of the toner base particle, wherein protruded portions constituted from the organosilicon polymer are present at the surface of the toner base particle, when a protruded portion having a height of 30 to 200 nm among the protruded portions is defined as a protrusion x, and the protrusion x is observed in a specific condition using a scanning electron microscope, an average aspect ratio of the protrusion x is 1.3 or more, and when shape measurements of a specific region of the surface of the toner particle are carried out using an atomic force microscope and measured data obtained by observing the protruded portions at the surface of the toner particle is subjected to surface roughness analysis, an average angle of inclination ?a is 1.0 to 2.0°.

Abstract: A toner comprising a toner particle comprising a binder resin, wherein the toner particle comprises a compound represented by a following structural formula (1) and a compound represented by a following structural formula (2), and a content of the compound represented by the following structural formula (2) comprised in the toner is 0.

Abstract: A toner comprising a toner particle comprising a binder resin, and an external additive, wherein the toner particle further comprises a monohydric aliphatic alcohol, the monohydric aliphatic alcohol has 8 to 18 carbon atoms, a content ratio of the monohydric aliphatic alcohol extracted from the toner with ethanol is 30 to 300 ppm by mass in the toner, and the external additive comprises at least one selected from the group consisting of hydrotalcite particles and alumina particles.

Abstract: A toner comprising a toner particle comprising a binder resin, wherein the toner particle further comprises: a compound represented by R1—[OCH2CH2]n—OH, where, R1 represents a linear or branched alkyl group having 8 to 22 carbon atoms, and n is an integer of 1 to 3; and at least one polyvalent element selected from the group consisting of magnesium, calcium, aluminum, boron and iron, and a content of the polyvalent element in the toner is 100 mass ppm to 5000 mass ppm.

Abstract: A toner comprising a toner particle comprising a binder resin, wherein the toner particle further comprises a compound represented by a following formula (1) and a pigment having a quinacridone structure; where, in the formula (1), R represents a linear or branched alkyl group having 4 to 22 carbon atoms, and n is an integer of 1 to 4.

Abstract: A toner comprising a toner particle comprising a binder resin, wherein the toner particle further comprises a monohydric aliphatic alcohol, and an anionic surfactant having an alkyl group, the binder resin comprises a polyester resin, a carbon number of the monohydric aliphatic alcohol is 8 to 18, a content of the monohydric aliphatic alcohol when extracted from the toner with ethanol is 30 to 300 ppm by mass in the toner, and a value of a ratio (molar ratio) of the monohydric aliphatic alcohol extracted from the toner with ethanol relative to the anionic surfactant having an alkyl group extracted from the toner with methanol is 0.01 to 0.60.

Abstract: A toner comprising a toner particle comprising a core particle comprising a binder resin, and a shell on a surface of the core particle, wherein the shell comprises an oxazoline group and a polyvalent metal, and in an electron image of a cross-section of the toner particle taken with a transmission electron microscope, the polyvalent metal has atomic concentration C(M) of 0.0010 to 0.5000 atomic % as measured by energy dispersive X-ray analysis of the shell.

Abstract: A toner comprises a toner particle comprising a core particle comprising a resin component, a shell coating the surface of the core particle, and a polyvalent metal. The resin component comprises a polyester resin, and the shell comprises an amino resin; in an electron image of a cross section of the toner acquired using a transmission electron microscope, a polyvalent metal content P(M) obtained by energy-dispersive x-ray analysis at the core/shell interface and in the vicinity of this interface is 0.0010 to 2.00 atomic %; and the surface storage elastic modulus of the toner at a load of 30 ?N at 25° C., according to nanoindentation measurement of the toner, is from 6.50 GPa to 12.00 GPa.

Abstract: The toner includes a toner particle that comprising a core particle containing a resin component and a shell on a surface of the core particle, wherein the resin component comprises more than 50.0 mass % of a polyester resin comprising a monomer unit that contains a heterocyclic group, and the shell comprises at least one resin selected from the group consisting of prescribed (meth)acrylic resins and melamine resins.

Abstract: The toner has a toner particle that contains a binder resin, wherein the binder resin contains a styrene-acrylic resin that has a structure derived from a crosslinking agent, the binder resin includes tetrahydrofuran-insoluble matter in an amount of from 5 mass % to 60 mass % of the binder resin, and the crosslinking agent contains a polymeric compound provided by an addition reaction at least between a particular multifunctional (meth)acrylate compound and a particular polyvalent mercapto compound.

Abstract: The toner contains a toner particle that has a binder resin, wherein an amount of a tetrahydrofuran THF-insoluble matter A collected when a THF dispersion of the binder resin is passed through a first filter having an average pore diameter of 8 ?m, is not more than 10 mass % of the binder resin, and an amount of a THF-insoluble matter B collected when the THF dispersion that has been passed through the first filter is passed through a second filter having an average pore diameter of 0.8 ?m, is from 5 mass % to 50 mass % of the binder resin.

Abstract: The toner contains a toner particle that has a binder resin, wherein an amount of a tetrahydrofuran THF-insoluble matter A collected when a THF dispersion of the binder resin is passed through a first filter having an average pore diameter of 8 ?m, is not more than 10 mass % of the binder resin, and an amount of a THF-insoluble matter B collected when the THF dispersion that has been passed through the first filter is passed through a second filter having an average pore diameter of 0.8 ?m, is from 5 mass % to 50 mass % of the binder resin.

Abstract: The toner has a toner particle that contains a binder resin, wherein the binder resin contains a styrene-acrylic resin that has a structure derived from a crosslinking agent, the binder resin includes tetrahydrofuran-insoluble matter in an amount of from 5 mass % to 60 mass % of the binder resin, and the crosslinking agent contains a polymeric compound provided by an addition reaction at least between a particular multifunctional (meth)acrylate compound and a particular polyvalent mercapto compound.

Abstract: Provided is a toner having a toner particle that contains a binder resin and a wax, wherein the solubility parameter SP of the binder resin is at least 9.4 and not more than 10.0; the binder resin contains a resin having a structure represented by the following formula (1) in the terminal position on a main chain of the resin, *—CO—R??formula (1) (in formula (1), R represents a phenyl group or a derivative thereof, or —COOR1, R1 represents an alkyl group having 1 to 4 carbons, and * represents a bond to the main chain of the resin); the solubility parameter SW of the wax is at least 8.1 and not more than 9.0; and SP and SW satisfy formula (2), |SP?SW|>0.5??formula (2).

Abstract: Provided is a toner having a toner particle containing a binder resin and a wax, wherein the wax concentrations near the outermost surface of the toner and in the surface layer region below the outermost surface are controlled, so that the wax moves with high efficiency to near the outermost surface during heating.

Abstract: A toner comprising a toner particle that contains a binder resin and a wax, wherein in a cross sectional image of the toner observed with a transmission electron microscope, the toner satisfies the following formulas (1) and (2) 18.0%?As?1.5%??(1) 10.0?Ac/As?2.0??(2) where As represents the proportion for the area taken up by the wax present in the surface layer region having distance 1.0 ?m in a radial direction inward from the surface of the toner, and Ac represents the proportion for the area taken up by the wax present in the inner region positioned further inside than the surface layer region.

Abstract: Provided is a toner having a toner particle that contains a binder resin and a wax, wherein the solubility parameter SP of the binder resin is at least 9.4 and not more than 10.0; the binder resin contains a resin having a structure represented by the following formula (1) in the terminal position on a main chain of the resin, *—CO—R??formula (1) (in formula (1), R represents a phenyl group or a derivative thereof, or —COOR1, R1 represents an alkyl group having 1 to 4 carbons, and * represents a bond to the main chain of the resin); the solubility parameter SW of the wax is at least 8.1 and not more than 9.0; and SP and SW satisfy formula (2), |SP?SW|>0.5??formula (2).

Abstract: Provided is a toner including a toner particle containing a graft polymer, in which: the graft polymer has a crystalline polyester segment and an amorphous vinyl polymer segment; the crystalline polyester segment has a unit derived from a specific monomer (a) and a unit derived from a specific monomer (b); a content X (mol %) of the unit derived from the monomer (b) calculated from a specific formula is 1.0 mol % or more and 24 mol % or less; and a melting point of the graft polymer is 50° C. or more and 85° C. or less.

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.