A toner comprising a binder resin and a near-infrared light absorbing material is provided. The toner in the form of a pellet has: a chroma C* of 20 or less in the L*C*h color space; a hue angle h of from 50 to 90 degrees in the L*C*h color space; and a spectral reflectance of 5% or less at a wavelength of from 800 to 900 nm.

A toner includes a europium complex represented by the following Chemical formula ##STR00001## where A represents 2-naphthyl group, 2-naphthyl group having a substitution group selected from the group consisting of an alkyl group, an alkoxy group, and a halogen, R represents a fluoroalkyl group having one to three carbon atoms or a methyl group, and R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each, independently represent hydrogen atoms, alkyl groups, or aryl groups, wherein the toner has a hydroxyl value of from 20 to 40 mgKOH/g.

A toner is provided. The toner comprises a glittering pigment and a coloring pigment. The glittering pigment is disposed inside the toner. The coloring pigment comprises a yellow pigment comprising an isoindoline pigment.

The problem is solved by a printing toner containing sublimable dye including: toner base particles at least including a binder resin, a disperse dye, and a mold release agent; and an external additive externally added to surfaces of the toner base particles, in which the toner base particles include the binder resin in a proportion of 50% to 95% by mass in the toner base particles, and include, as the binder resin, an aliphatic polyester-based resin in a proportion of 20% to 70% by mass in the toner base particles; and the disperse dye is a sublimable dye.

A composition includes an isomerized polymer containing a structural unit containing an isomerized structure and an isomerized low molecular weight compound, the composition being fluidized by light irradiation from a solid state and being reversibly non-fluidized.

Provided is a magenta toner, which is excellent in image density, has an enhanced chargeability, and can be produced at a low cost. The magenta toner comprising a binder resin and a magenta colorant, wherein a compound A represented by the general formula (1) and a compound B represented by the general formula (2) are contained as the magenta colorant, and wherein a total content of the compound A and the compound B is from 3 to 30 parts by mass with respect to 100 parts by mass of the binder resin, and a mass ratio of the content of the compound A to the content of the compound B (compound A/compound B) is from 0.8 to 20.

An image forming apparatus includes a first image forming unit for forming a first image on a sheet using a first toner. The first toner includes at least two fluorochromes which have a fluorescence peak in a wavelength range different from one another. A second image forming unit is configured to form a second image on the sheet using a second toner. The second toner includes a visible colored pigment. A softening point temperature of the first toner, as measured by differential scanning calorimetry, is higher than a softening point temperature of the second toner, as measured by differential scanning calorimetry.

An image forming apparatus includes a first image forming unit for forming a first image on a sheet using a first toner. The first toner includes at least two fluorochromes which have a fluorescence peak in a wavelength range different from one another. A second image forming unit is configured to form a second image on the sheet using a second toner. The second toner includes a visible colored pigment. A softening point temperature of the first toner, as measured by differential scanning calorimetry, is higher than a softening point temperature of the second toner, as measured by differential scanning calorimetry.

A toner includes a europium complex represented by the following Chemical formula

##STR00001##

where A represents 2-naphthyl group, 2-naphthyl group having a substitution group selected from the group consisting of an alkyl group, an alkoxy group, and a halogen, R represents a fluoroalkyl group having one to three carbon atoms or a methyl group, and R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each, independently represent hydrogen atoms, alkyl groups, or aryl groups, wherein the toner has a hydroxyl value of from 20 to 40 mgKOH/g.

A fluorescent yellow toner including a core comprising a first solvent yellow 160-incorporated amorphous polyester; a second solvent yellow 160-incorporated amorphous polyester; wherein the first amorphous polyester and the second amorphous polyester are different; and a crystalline polyester; a shell disposed over the core, the shell comprising at least one amorphous polyester; wherein the toner provides printed images having an L* value of greater than 90, an a* value of from about less than ?40 to about ?20, and a b*value of greater than 75. A process of printing the fluorescent yellow toner.