A toner having a toner particle which contains a binder resin, a fatty acid metal salt, and a resin having an ionic functional group, in which the fatty acid metal salt is a fatty acid metal salt of a polyvalent metal with valency of 2 or higher and a fatty acid with carbon atom number of at least 8 and not more than 28, and the acid dissociation constant pKa of the resin having an ionic functional group is at least 6.0 and not more than 9.0.

The object of the present invention is to provide a toner for development of electrostatic images (hereinafter referred to as toner) which, while preventing dust during fixation, secures improved hot offset resistance and is excellent in providing good image quality. The invention relates to the toner that comprises a binder resin, a colorant and a wax, wherein the wax has, while in a state of being contained in the toner, a melting point of from 55 C. to 90 C., and the value Dt of the toner satisfies a specific formula.

The present disclosure is drawn to an electrostatic ink composition comprising a resin and an elongate conductive species. Also disclosed herein is a substrate on which is electrostatically printed a conductive trace, wherein the trace comprises a resin and an elongate conductive species. Further disclosed herein is a method of electrophotographic printing an electrostatic ink composition comprising a resin and an elongate conductive species.

An electrostatic latent image developing toner contains a plurality of toner particles each including a toner core and a shell layer disposed over a surface of the toner core. The shell layer has at least one first domain having a film shape and a plurality of second domains each having a particle shape. The first domain is formed substantially from a non-crosslinked resin. The second domains are formed substantially from a crosslinked resin. The crosslinked resin has a glass transition point 45 C. or more greater than the non-crosslinked resin. The first domain has an average height from the surface of the toner core of at least 10 nm and less than 50 nm. The second domains have an average height from the surface of the toner core of at least 50 nm and no greater than 100 nm.

An electrostatic image developing toner including a toner particle, wherein the toner particle contains a vinyl resin which is a polymer of a vinyl monomer having an acid group, a polyester resin, at least one of aluminum (Al) and magnesium (Mg), and tin (Sn), and when net intensities of Al, Mg and Sn in the toner particle measured by fluorescent X-ray analysis are respectively expressed as I.sub.Al, I.sub.Mg and I.sub.Sn, a ratio (I.sub.Al+I.sub.Mg)/I.sub.Sn is within a range of 0.5 to 2.5.

The present invention relates to a toner for electrostatic charge image development, including toner base particles containing a binder resin containing as a main component a vinyl resin having a constitutional unit derived from a monomer having an acid group, and aluminum, wherein a concentration of the aluminum in the toner base particles, as measured by radio inductively coupled plasma emission spectral analysis, is from 900 to 2,200 ppm. According to the present invention, there is provided a means for improving the environmental stability of electrification, and the glossiness and the image density of the image to be formed in a good balance while maintaining sufficient low temperature fixability in a toner for electrostatic charge image development.

An electrostatic latent image developing toner contains a plurality of toner particles each including a toner core and a shell layer disposed over a surface of the toner core. The shell layer has at least one first domain having a film shape and a plurality of second domains each having a particle shape. The first domain is formed substantially from a non-crosslinked resin. The second domains are formed substantially from a crosslinked resin. The crosslinked resin has a glass transition point 45 C. or more greater than the non-crosslinked resin. The first domain has an average height from the surface of the toner core of at least 10 nm and less than 50 nm. The second domains have an average height from the surface of the toner core of at least 50 nm and no greater than 100 nm.

A resin composition for a toner including a polyester resin and a colorant, wherein the polyester resin has A(10)-A(180) of 70 or greater, where A(10) (%) is a transmittance of light having a wavelength of 500 nm through a mixture of 20 parts by mass of the polyester resin added to 80 parts by mass of ethyl acetate and stirred at 25 C. for 10 minutes, and A(180) (%) is the transmittance after the mixture is left to stand for 3 hours.

The present invention is a toner including a toner particle containing a binder resin and a charge control agent, wherein the binder resin includes a resin having a polyester unit with at least one aliphatic compound condensed to the terminal thereof, the at least one aliphatic compound being selected from the group consisting of aliphatic monocarboxylic acids each having 30 or more and 102 or less carbon atoms and aliphatic monoalcohols each having 30 or more and 102 or less carbon atoms; and the charge control agent includes a specific compound (a pyrazolone monoazo metal compound).

An electrostatic charge image developing toner set contains a black toner having black toner particles that contain a binder resin and a black colorant; and a magenta toner having magenta toner particles that contain a binder resin and a magenta colorant, in which the binder resin contained in the black toner particles and the magenta toner particles includes an amorphous polyester resin and a crystalline polyester resin, a content of the crystalline polyester resin with respect to the binder resin in the black toner particles and the magenta toner particles is 7% by mass or more and 40% by mass or less, the amorphous polyester resin contained in the black toner particles and the magenta toner particles consists of a constitutional unit derived from a polyvalent carboxylic acid and a constitutional unit derived from a polyhydric alcohol, and a relationship between a mass proportion (% by mass) P(K) of the constitutional unit derived from a phthalic acid other than terephthalic acid with respect to the constitutional unit derived from a polyvalent carboxylic acid in the amorphous polyester resin contained in the black toner particles and a mass proportion (% by mass) P(M) of the constitutional unit derived from a phthalic acid other than terephthalic acid with respect to the constitutional unit derived from a polyvalent carboxylic acid in the amorphous polyester resin contained in the magenta toner particles satisfies the following expression (P1).

[00001]$\begin{array}{cc}10P\left(M\right)-P\left(K\right)40& \mathrm{Expression}\left(\mathrm{P1}\right)\end{array}$