A toner comprising: a toner particle comprising a binder resin and boric acid; wherein the binder resin comprises an amorphous resin and a crystalline polyester resin, a content of the crystalline polyester resin in the toner is 30.00 to 80.00 mass %, and a content of the boric acid in the toner is 0.10 to 10.00 mass %.

A toner has excellent low temperature fixing property, heat resistant preservability, and stable image quality. The toner contains a core including a crystalline polyester, and a shell formed on a surface of the core. An aspect ratio of the crystalline polyester in the toner is within a range from 1 to 3, and an average length of a longitudinal diameter of the crystalline polyester is within a range from 10 nm to 500 nm.

A toner includes toner base particles and external additives deposited on a surface of the toner base particle. The toner base particle includes an amorphous polyester resin, a crystalline polyester resin, a release agent, and resin particles. An abundance ratio of the crystalline polyester resin in the surface of the toner base particle as observed by TEM is 2.5% or greater but 25% or less. The resin particles are deposited at the surface of the toner base particle as observed by SEM. A ratio of aggregates of the resin particles occupying the surface of the toner base particle is 1% or greater but 70% or less, where R is a major axis of the minimum particle of the resin particles, and the resin particle having a major axis of 3R or greater is determined as the aggregate.

Toner includes, as toner particles, first particles and second particles. The first particles each include a first core and a first shell layer covering a surface of the first core. The first core contains a first binder resin and is free from metal stearates. The second particles each include a second core and a second shell layer covering a surface of the second core. The second core contains a metal stearate. The first shell layer and the second shell layer are formed of resins of the same type, respectively. The content of the metal stearate in the second core is 50% by mass or more with respect to the mass of the second core as a whole. The number ratio of the second particles is 5% or more but 25% or less of the total number of the first particles and the second particles.

The present disclosure provides processes for producing images with toner particles. In embodiments, toner particles of a certain diameter in size are applied to a substrate as an incomplete monolayer, and then fused to form an image that is a complete monolayer and possesses a thickness less than the diameter of the particles utilized to form the image.

A toner particle includes a core particle including a binder resin, and a plurality of fine particles that are smaller than the core particle and that are attached to a surface of the core particle. The fine particles include silica fine particles, and inorganic fine particles having a band gap energy of 2.5 to 7.0 eV and a relative permittivity of 30 to 100. The toner particle has a content of titanium dioxide of less than 1% by mass.

[Object] To provide toner particles for developing an electrostatically charged image which are hardly affected by a particle size of resin fine particles and are more excellent in fixability and heat-resistant preservability.

[Solution] A toner particle for developing an electrostatically charged image including a toner base particle and a resin coating covering the toner base particle, in which the toner base particle includes a recess on a surface of the toner base particle, the recess includes a recess having a depth of 50 nm to 500 nm, the resin coating includes a coating (A) portion having a thickness of 10 nm or more and less than 50 nm and a coating (B) portion having a thickness of 50 nm or more and 500 nm or less, and the coating (B) portion is present on the recess.

A toner comprising a toner particle comprising a binder resin, wherein the toner particle further comprises: a compound represented by R.sup.1—[OCH.sub.2CH.sub.2].sub.n—OH, where, R.sup.1 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.

An electrostatic charge image developing toner contains: a toner particle including a core portion containing a binder resin and a release agent that has a melting temperature Tm of 80° C. or less, and a coating layer that coats the core portion and contains an amorphous polyester resin, and the toner particle has a cross section in which one or more and three or less domains of the release agent are present in the core portion, the one or more and three or less domains having a circle-equivalent diameter of 1 μm or more and 3 μm or less, the toner particle has a volume average particle diameter of 4.2 μm or more and 5.8 μm or less, and a ratio of a thickness of the coating layer to a maximum diameter of the toner particle is 1% or more and 25% or less in the cross section.

An electrostatic charge image developing toner includes a toner particle, and the toner particle includes: a core particle containing a large-diameter particle having a number average particle diameter of 1 μm or more; and a shell layer that includes at least two resin layers each containing an amorphous resin and covers a surface of the core particles, and an outermost layer of the at least two resin layers is a resin layer being made of the amorphous resin.