Disclosed is a toner including toner particles each including a core portion that contains a binder resin, and a surface layer containing an organosilicon polymer, in which each of the toner particles contains a polyvalent metal element having a resistivity of 2.5×10.sup.−8 Ω.Math.m or more and 10.0×10.sup.−8 Ω.Math.m or less at 20° C., and when the toner particles are subjected to X-ray fluorescence analysis, a net intensity originating from the polyvalent metal element is 0.10 kcps or more and 30.00 kcps or less.

An electrostatic charge image developing toner contains toner particles, titanic acid compound particles that are added to an exterior of the toner particles, have a peak existing in a range of 20 nm or more and less than 80 nm in a number-based primary particle size distribution curve, and have an average circularity of 0.88 or more and 0.94 or less, and silica particles that are added to the exterior of the toner particles and have, in a number-based primary particle size distribution curve, a small size-side peak existing in a range of 20 nm or more and less than 80 nm, a large size-side peak existing in a range of 80 nm or more and less than 130 nm, and a valley existing between the small size-side peak and the large size-side peak, in which a difference in a particle size between the peak in the number-based primary particle size distribution curve of the titanic acid compound particles and the small size-side peak in the number-based primary particle size distribution curve of the silica particles is 20 nm or less, and in the number-based primary particle size distribution curve of the silica particles, in a case where the silica particles having a particle size less than the valley are defined as small-sized silica particles, and the silica particles having a particle size equal to or larger than the valley are defined as large-sized silica particles, an average circularity of the small-sized silica particles is 0.88 or more and 0.94 or less.

A method for manufacturing a toner including supplying powder particles containing a binder resin via a plurality of powder-particle supplying units to a treating chamber, the treating chamber having a cylindrical inner peripheral surface, heat treating the powder particles in the treating chamber by supplying hot air into the treating chamber, wherein a temperature of the hot air supplied into the treating chamber is 100.0° C. or higher and 200.0° C. or lower, and adjusting a humidity of the hot air so that a relative humidity of the hot air supplied into the treating chamber is 3.0% or more and 80.0% or less.

An electrostatic charge image developing toner includes toner particles, silica particles having an average particle diameter of 80 nm to 200 nm, lubricant particles N which has negatively chargeable property, and lubricant particles P which has positively chargeable property, wherein a content (s) of the silica particles, a content (n) of the lubricant particles N, and a content (p) of the lubricant particles P satisfy relationships of Expression (1): 0.002≦p/s≦0.2; and Expression (2): 0.02≦n/s≦0.5.

By controlling the migration to the toner particle surface of the crystalline polyester present in the toner particle, a toner is provided that exhibits an excellent durability in long-term use, a stable charging performance after holding in a high-temperature, high-humidity environment, and an excellent low-temperature fixability, in which the toner having a toner particle that contains an amorphous resin, a crystalline polyester, and a wax, wherein the toner particle includes, at the surface thereof, a coat layer containing a cyclic polyolefin resin.

An electrostatic charge image developing toner includes: toner particles; first silica particles having an average circularity of 0.9 to 1.0, a particle size distribution index of 1.05 to 1.25, and a compression aggregation degree of 60% to 95%; and second silica particles having an average circularity of 0.9 to 1.0, a particle size distribution index of 1.05 to 1.25, and a compression aggregation degree of 60% to 95%, wherein, when an average primary particle diameter of the first silica particles is set as Da (nm) and an average primary particle diameter of the second silica particles is set as Db (nm), relationships of the following Expressions (A1) to (A3) are satisfied: Expression (A1): 80≦Da≦120, Expression (A2): 120≦Db≦200, and Expression (A3): 10≦Db−Da≦120.

A toner of the present invention includes at least a colorant and a resin, has crystallinity CX or 20 or greater, and has a dynamic viscoelasticity characteristic in which a logarithmic value Log G′(50) of storage elastic modulus (Pa) at 50° C. is from 6.5 to 8.0 and a logarithmic value Log G′(65) of storage elastic modulus (Pa) at 65° C. is from 4.5 to 6.0, when the dynamic viscoelasticity characteristic is measured by temperature sweep from 40° C., at a frequency of 1 Hz, at a strain amount control of 0.1%, and at a temperature elevating rate of 2° C./min.

A toner includes a base particle; and an external additive covering the base particle. The toner includes a tetrahydrofuran (THF)-insoluble component having a glass transition temperature determined from a DSC curve when heated for the second time of from −50° C. to 10° C. and an average circularity not greater than 0.98, and satisfies the following relation:
Bt−0.025×Ct≦1.80 wherein Bt represents a BET specific surface area [m.sup.2/g]; and Ct represents a coverage [%] of the external additive covering the base particle.

A toner includes first toner particles and second toner particles. Each of the first toner particles includes a plate-like colorant particle covered with binder resin particles, and a volume average size of the plate-like colorant particle is equal to or greater than 6 μm. Each of the second toner particles includes at least one of a binder resin and a releasing agent and not including a colorant, an aspect ratio of the second toner particles is equal to or smaller than 3, and a content ratio of the releasing agents with respect to the second toner particles is equal to or greater than 4 wt % and equal to or smaller than 24 wt %. A content ratio of the second toner particles with respect to the first toner particles is greater than 1 wt % and equal to or smaller than 75 wt %.

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.