An electrostatic charge image developing toner includes a toner particle that contains a pyrazolotriazole-based dye and a zirconium oxide particle.

A toner including particles containing a binder resin, a colorant, and wax, the toner having, in differential scanning calorimetry (DSC) performing a temperature program including steps of heating from 40° C. to 100° C. or more at a heating rate of 10° C./min (first heating), then cooling to 40° C. or less at a cooling rate of 10° C./min (first cooling), and then heating to 100° C. or more at a heating rate of 10° C./min (second heating), a total endothermic amount HA1 in the first heating from 40° C. to 100° C. and a total endothermic amount HA2 in the second heating from 40° C. to 100° C. that satisfy the following relationship (1), and a difference between a full width at half maximum of an endothermic peak in the second heating and a full width at half maximum of an exothermic peak in the first cooling of 7.00° C. or less: (1) HA2/HA1>0.80.

An electrostatic image developer includes a toner containing toner particles, a carrier, and an external additive containing titanium dioxide particles of two types having different refractive indexes, fatty acid metal salt particles, and an abrasive.

An image formation apparatus according to an embodiment may include: a first image formation section configured to form a first image of a developer containing a lustrous pigment; a second image formation section configured to form a second image of a dyeing developer; and a transfer section configured to transfer the first image and the second image on a medium such that the first image and the second image are stacked to each other on the medium.

A toner set and an image forming method, both of which can print a full-color image that is superior in gradation and color reproducibility of an image including a higher-order color and superior in continuous printing durability. When one color toner selected from the group consisting of the color toners included in the toner set is defined as a first toner and other color toners are defined as second toners, an internal friction angle θ1 (°) of the first toner and an internal friction angle θ2 (°) of each of the second toners satisfy relationships represented by the following formulae (1) and (2), and a first image developed with the first toner and second images developed with the second toners are transferred in this order on a recording medium or a transfer medium to form an image including a higher-order color:

θ1<θ2  Formula (1):

1°≤θ2−θ1≤3°.  Formula (2):

A toner particle includes a binder resin, a colorant, and a wax. The binder resin includes an amorphous polyester resin and a crystalline polyester resin. The amorphous polyester resin includes, as monomer units, a first monomer having a pendant group, terephthalic acid, and ethylene glycol.

A toner particle includes a binder resin, a colorant, and a wax. The binder resin includes an amorphous polyester resin and a crystalline polyester resin. The amorphous polyester resin includes, as monomer units, a first monomer having a pendant group, terephthalic acid, and ethylene glycol.

A fixing apparatus includes an endless first rotary member, a heating element, a second rotary member configured to form a nip portion, and a nip member configured to receive radiant heat from the heating element and heat the nip portion. The nip member includes a main-body portion that contains aluminum or aluminum alloy and a protective layer that includes an oxide film formed on a surface of the main-body portion. The main-body portion contains a heat receiving surface that faces the heating element and receives radiant heat from the heating element, and a rubbed surface that is rubbed against the inner circumferential surface of the first rotary member. The protective layer contains coloring agent that causes an emissivity of the heat receiving surface and the rubbed surface to be higher than an emissivity of a natural color oxide film.

A printing machine including a printing plate on a surface of a rotating cylinder, in which the printing plate has a fixed pattern for receiving a toner; a vessel containing the toner, which includes a pigment and a thermoplastic binder, in which the fixed pattern is a permanent pattern in a form of selected portions of an image is disclosed. A plate for use in the printing machine is also disclosed. A printing system is also disclosed.

An object of the present invention is to provide a compound exhibiting a cyan color having properties such as high chroma, high light fastness, and high solubility. The compound is represented by the following General Formula (1). ##STR00001##
In Formula (1), R.sub.1 and R.sub.2 each independently represent a linear, branched, or cyclic alkyl group having 6 or more and 12 or fewer carbon atoms, R.sub.3 represents a 4-alkylphenyl group, a 4-halogenated phenyl group, or a 3-alkoxyphenyl group, R.sub.4 represents a linear, branched, or cyclic alkyl group having 1 or more and 8 or fewer carbon atoms, and R.sub.5 represents a linear, branched, or cyclic alkyl group having 1 or more and 8 or fewer carbon atoms or a benzyl group.