An electrostatic charge image developing toner set includes a white toner that includes white toner particles containing a core and a coating layer which does not contain a coloring agent and a colored toner that includes colored toner particles containing a core and a coating layer which does not contain a coloring agent, wherein with respect to a difference between an average equivalent circle diameter [Rw1] of the cores (W.sub.in) in the white toner particles and an average equivalent circle diameter [Rw2] of the white toner particles [Rw2Rw1], and a difference between the average equivalent circle diameter [Rc1] of the cores (C.sub.in) in the colored toner particles and the average equivalent circle diameter [Rc2] of the colored toner particles [Rc2Rc1], a relationship of the following Expression (1) is satisfied:
[Rw2Rw1]<[Rc2Rc1](1).

Graphene-containing toners are provided. In an embodiment, a graphene-containing toner comprises a core comprising graphene, a crystalline polyester resin, and an amorphous polyester resin, the toner further comprising a shell over the core. Methods of making and using the toners are also provided.

An electrostatic charge image developing toner includes toner particles including a particulate toner matrix and an external additive adhering to a surface of the particulate toner matrix. The particulate toner matrix includes a crystalline polyester resin. The external additive includes silica particles. The silica particles are secondary particles including primary particles having a diameter in the range of 30 to 90 nm. The secondary particles have an average circularity in the range of 0.25 to 0.50. The secondary particles have an average aspect ratio of 3.0 or more.

Toner particles each include a toner mother particle and an external additive. The toner mother particle includes a toner core containing a binder resin and a shell layer covering a surface of the toner core. The external additive includes a plurality of external addition resin particles. The external addition resin particles are each present on a surface of the shell layer. The shell layer contains a specific vinyl resin. The toner core and each resin particle are bonded together through a covalent bond within the shell layer. A detachment rate of the resin particles is lower than 5%.

Toner particles contain a core-shell resin particle containing at least one (sulfo) polyester containing a metal on nanoparticle, and a shell containing a metal ion nanoparticle.

A magnetic toner includes toner particles. The toner particles each include a toner core and a shell layer covering a surface of the toner core. The toner cores contain a polyester resin and a magnetic powder. The magnetic powder includes specific magnetic particles. The shell layers contain a specific vinyl resin.

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.

An electrostatic latent image developing toner includes plural toner particles containing a crystalline resin, a non-crystalline resin, and a plurality of releasing agent domains. The number of releasing agent domains having a dispersion diameter of at least 50 nm and no greater than 700 nm is at least 15 and no greater than 50 per one toner particle in cross-sections of the toner particles. A total area of the releasing agent domains having a dispersion diameter of at least 50 nm and no greater than 700 nm in the cross-sections of the toner particles is at least 5% and no greater than 20% relative to an area of the cross sections of the toner particles.

A chemically prepared toner composition according to one example embodiment includes a core including a first polymer binder, a colorant and a release agent; a shell that is formed around the core that includes a second polymer binder; and a borax coupling agent between the core and the shell and an alkoxysilane hydrocarbon or combination of different alkoxysilane hydrocarbons that are bonded to the outer surface of the shell using a hydrolytic deposition process. This successful alkoxysilane hydrocarbon surface treatment on the outer surface of the toner particle results in attaining a desirable charge stability in hot and humid environments and ultimately improving the quality of the toner, especially by reducing toner dusting, toner fuming and ultra-fine particles generation.

A method for producing core shell toner for electrophotography according to one embodiment, includes surface treating the outer surface of a core shell toner particle with a alkoxysilane hydrocarbon or combination of different alkoxysilane hydrocarbons using a hydrolytic deposition process after the core shell toner particle is fully formed. This method results in the bonding of the alkoxysilane hydrocarbon or combination of different alkoxysilane hydrocarbons to the outer surface of the core shell toner particle. In an alternative method, the outer surface of the toner is surface treated with the alkoxysilane hydrocarbon solution and then fused to form toner particles. The alkoxysilane hydrocarbon surface treated core shell toner also can be mixed with magnetic carrier beads to form a developer mix to be used in a dual component development electrophotographic printer.