An electrostatic charge image developing toner includes a toner particle that contains a silicon phthalocyanine dye and a zirconium oxide particle.

An electrostatic charge image developing toner contains toner particles that contain a binder resin and resin particles and an external additive that contains inorganic particles, in which a loss coefficient tanδ.sub.a of the resin particles at 40° C. and 0.1 rad/s satisfies 0.1 < tanδ.sub.a < 1.0, a loss coefficient tanδ.sub.b of the resin particles at 40° C. and 10 rad/s satisfies 1.3 < tanδ.sub.b < 3.0, and in a case where a strain of 0.005% is applied to the toner at 40° C., a stress relaxation time .sub.τ of the toner satisfies 5 seconds < τ < 500 seconds.

A toner comprising a toner particle comprising an organic pigment and a binder resin, wherein, in a solid-state NMR measurement at 60° C. using a solid fraction obtained by specific procedure for dissolving the toner in chloroform as a sample, a transverse relaxation time T2 of a peak observed between 1.5 and 2.5 ppm is from 0.08 to 0.13 ms.

A toner includes toner particles. Each toner particle includes a binder resin, a release agent, a colorant, and particles. The particles are metal particles, or halogen particles, or both. A metal constituting the metal particles may have a monovalent or higher ionic valence. An abundance X of the particles is within a range represented by 3 μm.sup.2≤X μm.sup.2≤10 μm.sup.2. X μm.sup.2 is the abundance X that is an area of the particles present in a surface portion of each of the toner particles as measured by SEM-EDX with setting acceleration voltage to 1 kV. A declining rate of the particles is 80% to 100%. Y μm.sup.2 is an abundance Y that is an area of the particles present in a surface portion of each of the toner particles as measured by the SEM-EDX with setting acceleration voltage to 3 kV.

An apparatus and method of manufacturing a white dry ink pulverized toner including a resin and 15%-45% TiO2 pigment having a mean size of 100-350 nm melt mixed with the resin in a twin screw extruder resulting in an extruded mix. The extruded mix is pulverized in a fluid bed jet mill. Fines of the pulverized extruded mix less than 5 microns may be removed from the pulverized extruded mix by classification leaving pulverized particles having a mean size of 6-12 microns. The pulverized particles are blended in a mixer with surface additives including silica and ZnSt, and the white dry ink pulverized toner has a developer charge between 5 and 50 μC/gram and a Lightness (L*) of at least 75 at a toner mass per unit area (TMA) of at most 1.2 mg/cm.sup.2.

A toner composition having improved toner usage efficiency, wherein toner particles having an average size range of 1-25 μm may be mixed with an extra particulate additive package including a first small silica surface treated with both a silane and an aminosilane having a primary particle size of about 5 nm-20 nm, a second fumed silica having a primary particle size of 30 nm-60 nm, a third silica having a primary particle size of about 70 nm-120 nm, an electro-conductive titania having a primary particle size of 30 nm-60 nm and an acicular titania having a size of about 1.6 μm to 1.7 μm in length and about 130 nm in diameter. An alternative embodiment of the extra particulate additive package does not include a third silica having a primary particle size of about 70 nm-120 nm.

A toner comprises a toner particle containing an amorphous polyester, wherein the amorphous polyester contains an amorphous polyester 1, the amorphous polyester contains a tin compound and a titanium compound, a Sn/Ti abundance ratio between Sn and Ti in the amorphous polyester according to x-ray fluorescence analysis is 20/80 to 80/20, and a weight-average molecular weight Mw1 of the amorphous polyester 1 according to measurement by gel permeation chromatography (GPC) is Mw1<7,000.

A toner for developing an electrostatic charge image contains toner particles containing at least one binder resin; the Mg element in an amount such that the net intensity of x-ray fluorescence from the Mg element in the toner is 0.10 kcps or more and 1.20 kcps or less; and at least one external additive including particles of a metal salt of a fatty acid.

The present invention is directed to providing a toner having no environmental difference in charging performance, and having high stability of images after output of a large number of copies under environments at high temperature and high humidity in a higher-speed one-component developing system, and a method for producing the toner, and the toner comprises a toner particle including a toner base particle containing a binder resin, a colorant and a releasing agent; and a resin particle adhering to the surface of the toner base particle, wherein the resin particle contains a resin A, and the resin A has an ionic functional group and an acid dissociation constant pKa of 7.0 or more and 9.0 or less, and the resin A has a monovalent group a represented by Formula (1): ##STR00001##

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.