A toner containing a toner particle that contains a binder resin including a polyester resin, and a polyolefin resin having —COOM that is a neutralized carboxy group with a monovalent metal ion M, wherein the polyolefin resin having —COOM is a polymer in which a vinyl polymer is bonded to a polyolefin, a content of a monomer unit containing —COOM in the polyolefin resin having —COOM is 1 to 20 mass %, and in a FT-IR spectrum obtained through measurement of a large particle size-side particle group and a small particle size-side particle group obtained by dividing the toner into two substantially equal parts, on a number basis, a ratio of the intensity of a maximum absorption peak in a range from 1545 cm.sup.−1 to 1555 cm.sup.−1 with respect to the intensity of a maximum absorption peak in a range from 1713 cm.sup.−1 to 1723 cm.sup.−1 exhibits a specific relationship.

A method for coating pigment particles is provided, the method comprising heating a polymer resin in a carrier fluid to dissolve the polymer resin, suspending in the carrier fluid the pigment particles to be coated; and effecting precipitation of the polymer resin from the carrier fluid, such that a coating of the resin is formed on the pigment particles.

A method for producing a toner for developing an electrostatic charge image includes: aggregating at least resin particles contained in a dispersion by using an aluminum aggregating agent to form aggregated particles; heating and fusing the aggregated particles to form fused particles; cooling a dispersion containing the fused particles to obtain a toner particle dispersion; and adjusting a pH of the toner particle dispersion to 8 or more and 11 or less.

A method for producing a toner for developing an electrostatic charge image includes aggregating at least resin particles and releasing agent particles contained in a dispersion to form aggregated particles; heating and fusing the aggregated particles to prepare a dispersion containing fused particles; and cooling the dispersion containing the fused particles to a temperature equal to or lower than a temperature 30° C. lower than an endothermic peak onset temperature derived from a releasing agent that constitutes the releasing agent particles, in which, in the cooling, the dispersion is cooled at a rate of 30° C./min or more and 130° C./min or less.

A toner is provided, which is obtained by heat treating a toner particle containing a crystalline polyester resin, an amorphous polyester resin, a hydrocarbon wax and a wax dispersant, wherein the crystalline polyester resin is a hybrid resin having crystalline polyester segments and amorphous vinyl segments, and a mass ratio of crystalline polyester segments and amorphous vinyl segments in the crystalline polyester resin (crystalline segments/amorphous segments) is 70/30 to 98/2.

A toner including a toner particle including a binder resin, wherein fine particles A and B are present on a surface of the toner particle; the fine particles A are a fatty acid metal salt; the fine particles B have a specific volume resistivity; an average theoretical surface area of the toner particle, an amount of the fine particles A, and a coverage ratio of the toner particle surface by the fine particles A satisfy a specific relationship; the amount of the fine particles B is in a specific range; and a proportion F of an area occupied by a part of the fine particles B embedded in a surface vicinity region of the toner in a total area occupied by the fine particles B present in a cross section of one particle of the toner is 50% by area or more.

Toner classification apparatus comprising classification rotor comprising a plurality of vanes extending from rotation center side of classification rotor to outer circumference side of classification rotor; the plurality of vanes are disposed with prescribed gaps established between vanes; gaps form opening facing rotation center region of classification rotor; each of vanes is disposed such that portion of vane away from of center of rotation of classification rotor is located on more upstream side in a direction of rotation of classification rotor than portion of vane closer to center of rotation of classification rotor; each of vanes has elbow; and in a horizontal cross section provided by sectioning classification rotor in a rotational axis perpendicular direction of classification rotor, shape of vane satisfies prescribed formulae, as well as toner production method comprising classification step of carrying out classification process on particles to be classified by using toner classification apparatus.

The present disclosure relates to a polyester chemically produced toner composition including a core shell toner particle having special surface features and method to make the same. The special surface features on the outer surface of the core shell toner particle are created by the incorporation of a specially designed polymer latex having styrene and acrylate monomers into the core or shell of the toner particle wherein the polymer latex having styrene and acrylate monomers is tailored to be incompatible with the polyester resin(s) found in the core or the shell of the toner particle.

The present disclosure relates to a polyester chemically produced toner composition including a core shell toner particle having special surface features and method to make the same. The special surface features on the outer surface of the core shell toner particle are created by the incorporation of a specially designed polymer latex having styrene and acrylate monomers into the core or shell of the toner particle wherein the polymer latex having styrene and acrylate monomers is tailored to be incompatible with the polyester resin(s) found in the core or the shell of the toner particle.

A toner comprising a toner particle that contains a binder resin and fine particles A at the surface of the toner particle, wherein the fine particles A are organosilicon polymer fine particles, the organosilicon polymer fine particles have a number-average primary particle diameter of 30 nm to 500 nm, the organosilicon polymer fine particles have an attachment index for a polycarbonate film of not more than 3.5, the organosilicon polymer fine particles penetrate into the toner particle in a penetration depth b (nm), and protrude from the toner particle in a protrusion height c (nm), and b and c satisfy 0.05≤b/(b+c)≤0.40.