A toner for electrostatic image development contains toner particles containing a binder resin. The binder resin includes an amorphous resin and a crystalline resin. In the toner particles, a Net intensity of elemental Mg measured by X-ray fluorescence analysis is from 0.40 to 1.20 inclusive, and a Net intensity of elemental Cl measured by X-ray fluorescence analysis is from 0.02 to 0.60 inclusive.

A positively charged toner for development of an electrostatic image, containing matrix particles containing at least a binder resin and a release agent, coated with inorganic fine particles, the binder resin containing a crystalline resin, the release agent containing ester wax (W) containing a dipentaerythritol unit as a constitutional component, the inorganic fine particles containing positively charged silica (S1) and negatively charged silica (S2), and the positively charged silica (S1) having an average particle diameter that is smaller than an average particle diameter of the negatively charged silica (S2), and the negatively charged silica (S2) having an average particle diameter of 10 nm or more and 90 nm or less.

A magenta toner is provided. The magenta toner comprises toner particles each comprising a binder resin and a colorant. From 1.0% to 25.0% by number of the toner particles have a CH rate of 25.0% or more in absolute value. The CH rate is calculated from the following formula (1):

CH rate (%)=[(I.sub.n−I.sub.ave)/I.sub.ave]×100  Formula (1)

where, in a Raman spectrum of each toner particle, I.sub.n represents an integrated intensity within a wavenumber region of from 2,750 to 3,250 cm.sup.−1 when an intensity at a wavenumber λ within a wavenumber region of from 1,200 to 3,250 cm.sup.−1 is s normalized to 1, where a total intensity of all the toner particles is maximum at the wavenumber λ; and I.sub.ave represents an average of the I.sub.n.

A positively charged toner for development of an electrostatic image, containing matrix particles containing at least a binder resin and a release agent, coated with inorganic fine particles, the binder resin containing a crystalline resin, the release agent containing ester wax (W) containing a dipentaerythritol unit as a constitutional component, the inorganic fine particles containing positively charged silica (S1) and negatively charged silica (S2), and the positively charged silica (S1) having an average particle diameter that is smaller than an average particle diameter of the negatively charged silica (S2), and the negatively charged silica (S2) having an average particle diameter of 10 nm or more and 90 nm or less.

A toner for developing an electrostatic charge image includes toner particles containing a binder resin; and an external additive containing silica particles, in which a coefficient of variation of a Si content is determined by determining the Si content in 0.5 m0.5 m square regions in a surface of each of the toner particles after performing a process of dispersing the toner in water and drying the dispersed toner, and an amount of change between this coefficient of variation of the Si content and a coefficient of variation of a Si content before the process ((coefficient of variation of Si content after process)(coefficient of variation of Si content before process)) is 0.05 or more and 0.60 or less.

A method for curing of an actinic light sensitive ink or toner layer on a substrate includes irradiating the actinic light sensitive ink or toner layer with a first radiation dose D1 in a first spectral range between 320 nm and 445 nm, followed by a second radiation dose D2 in a second spectral range between 200 nm and 319 nm. The ratio D1/D2 of the first radiation dose and the second radiation dose is between 0.25 and 500, more preferably between 0.25 and 200, even more preferably between 0.50 and 100.

A toner for developing an electrostatic charge image includes toner particles containing a binder resin; and an external additive containing silica particles, in which a coefficient of variation of a Si content is determined by determining the Si content in 0.5 m0.5 m square regions in a surface of each of the toner particles after performing a process of dispersing the toner in water and drying the dispersed toner, and an amount of change between this coefficient of variation of the Si content and a coefficient of variation of a Si content before the process ((coefficient of variation of Si content after process)(coefficient of variation of Si content before process)) is 0.05 or more and 0.60 or less.

Provided is an external additive having a resin particle containing a crystalline resin, and an inorganic fine particle containing a metal atom, the inorganic fine particle being embedded in the resin particle, wherein part of the inorganic fine particle being exposed on a surface of the resin particle, the maximum endothermic peak temperature of the external additive during a first temperature rise is from 50.0 C. to 120 C., the shape factor SF-2 of the external additive is from 110 to 150, and the external additive satisfies following formulae (1) and (2) below, in which Za (mass %) is the percentage content of a metal atom contained in the inorganic fine particle on the surface of the external additive in X-ray photoelectron spectroscopy, and Zb (mass %) is the percentage content of the metal atom in thermogravimetric analysis of the external additive,
Za15(1), and
Za/Zb0.7(2)

A toner composite material includes toner particles that include a sulfonated polyester and a wax and metal nanoparticles disposed on the surface of the toner particles. A method includes providing such toner composite materials, fusing the material to a substrate and covalently linking a ligand to the surface of the silver nanoparticles via a thiol, carboxylate, or amine functional group. Detection strips include a substrate and such toner composite materials fused on the substrate.

The present disclosure relates generally to a method to make a chemically prepared toner that employs a crash cooling process. In particular, the crash cooling process involves the addition of a toner slurry having a temperature between 70 C. and 90 C. to an equivalent amount of cold water having a temperature between 5 C. and 20 C. Polyester and styrene acrylic toners as well as polyester core shell toners having a borax coupling agent between the toner core and toner shell made from this cooling process results in an improvement to the amount of toner waste, thereby achieving a higher toner usage efficiency for an electrophotographic printing system.