An emulsion aggregation toner including a toner particle comprising at least one resin; an optional colorant; an optional wax; and a reactive charge control agent comprising at least one positive charging compound comprising a member selected from the group consisting of an amine compound having at least 3 carbon atoms, an ammonium compound having at least 3 carbon atoms, a phosphonium compound having at least 3 carbon atoms, a boronium compound having at least 3 carbon atoms, and combinations thereof; at least one reactive anchoring compound comprising a member selected the group consisting of amino, epoxy, carboxylic, hydroxyl, silanol, cyanide, anhydride, aldehyde, ketone, vinyl, and combinations thereof; and wherein the charge control agent optionally further comprises a negative charging compound comprising a member selected from the group consisting of aromatic carboxylic acid, silanol, phenol, pyranone, furanone, and combinations thereof.

An external additive includes fine particles A that contain an organosilicon compound with a siloxane bond as a binder component and have fine particles B. The fine particles B are present at the surface of the fine particles A in a state at least partially embedded in the surface of the fine particles A. The external additive has a number average diameter of primary particles of 0.03 m or more and 0.30 m or less. The ratio BD/AD of the number average diameter BD of primary particles of the fine particles B to the number average diameter AD of primary particles of the fine particles A is 0.05 or more and 0.70 or less. The fine particles B have a volume resistivity of 1.010.sup.5 .Math.cm or more and 1.010.sup.13 .Math.cm or less and have an embedding rate of 30% or more and 90% or less.

A coating material which is processable by non-impact printing to form at least a part of a coating layer representing an image, the coating material having an amorphous resin portion, is curable and is configured for being applied with a thickness of at least 15 m, the coating material having one or more of the following: a polyester resin having at least one incorporated acid monomer and wherein at least 10 weight percent of the at least one incorporated acid monomer is isophthalic acid; a polyester resin containing 1 to 100 w-% of cycloaliphatic glycol compounds with respect to the total weight of the glycol compounds of the polyester resin component; an acrylic resin; a fluorine containing polymer; a polyurethane resin.

An electrostatic charge image developing toner includes a toner particle that contains a pyrazolotriazole-based dye and a zirconium oxide particle.

A silica functionalized with a siloxane is of the general formula (I), [SiO.sub.4/2].sub.a[R.sup.1SiO.sub.3/2].sub.b [R.sup.3R.sup.1SiO.sub.2/2].sub.c[R.sup.1.sub.3SiO.sub.1/2].sub.d[O.sub.1/2R.sup.2].sub.e (I). The indices a, b, c, d, e each independently have integer values a from 0 to 100, b from 0 to 100, c from 0 to 50, d from 3 to 200, e from 0 to 50, with the proviso that the sum of a, b and c is at least 1 and for more than 50% of the siloxanes in the mixture the sum of a, b and c is 4.

A compound that is fluidized by light irradiation and reversibly non-fluidized and is represented by the following general formula (1): ##STR00001## In the general formula (1), Ar.sub.1 and Ar.sub.2 each independently represent an aromatic hydrocarbon group optionally having a substituent or an aromatic heterocyclic group optionally having a substituent, and Y, Z.sub.1, and Z.sub.2 each independently represent a hydrogen atom or a lower alkyl group.

Provided is an electrostatic latent image developing toner including: toner base particles containing a binder resin and a white pigment; and an external additive, wherein silica particles are contained as the external additive, and the following relational expression (1) is satisfied, Relational expression (1): 0.70Wh_Si(B)/Wh_Si(A)0.95, in the above relational expression (1), Wh_Si (A) represents an NET intensity of a Si element contained in the white electrostatic latent image developing toner measured by wavelength dispersive X-ray fluorescence spectrometer, and Wh_Si (B) represents an NET intensity of a Si element contained in the white electrostatic latent image developing toner that has been ultrasonically dispersed in water.

Disclosed is an image forming system including a fixing device that fixes a toner image onto a recording medium. The fixing device includes: a belt; and a roller that includes: a first roller that stretches the belt; or a first roller that stretches the belt, and a second roller rotatably disposed in pressure contact with an outer peripheral surface of the belt, at least one of the roller includes a base body containing aluminum as a main component, the base body contains silicon in an amount exceeding 0.60% by mass, a standard deviation of a shape factor of toner base particles is 0.045 or less, and a variation coefficient of a volume average particle size of the toner base particles is 28.0% or less.

A toner containing at least toner core particles and an external additive component externally added to the surface of the toner core particle, wherein the external additive component contains at least titanium oxide particles, zinc oxide particles, and an external additive, wherein the titanium oxide particles and the zinc oxide particles have average primary particle sizes of from 75 to 200 nm and from 80 to 300 nm, respectively, and wherein, when external addition rates of the titanium oxide particles and the zinc oxide particles with respect to the toner core particles are defined as A mass % and B mass %, respectively, the toner satisfies relationships of formula (1): 0.5A/B2.0; and formula (2): 7(A+B)12.

A post-processing apparatus includes a support unit that fixes and supports a medium on which an image of a developer containing wax is fixed, and a rubbing unit that rubs a surface of the medium supported by the support unit while being in contact with the surface of the medium and moving along the surface of the medium.