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 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.

A toner set includes a plurality of toners, wherein the toner set includes a first toner containing a yellow colorant and a second toner containing a cyan colorant, the first toner and the second toner each contain a binder resin containing a vinyl-based resin and a crystalline resin, and a release agent containing a hydrocarbon wax, a content of the vinyl-based resin with respect to a total mass of the binder resin is 50% by mass or more, the first toner contains the crystalline resin having a moiety having a crystal structure and a crystal nucleating agent moiety having a crystal nucleating agent, and the second toner contains the cyan colorant that is a compound represented by general formula (1). ##STR00001##

The magenta toner is excellent in image density, has an enhanced chargeability, and can be produced at a low cost. The magenta toner includes a binder resin and a magenta colorant. A compound A represented by the following general formula (1) and C.I. Solvent Violet 59 are contained as the magenta colorant.

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 compound excellent in chroma, light resistance and solubility. The compound has a structure represented by Formula (1).

##STR00001## wherein R.sub.1 and R.sub.2 each independently represent a linear or branched alkyl group having 1 to 12 carbon atoms, R.sub.3 represents a linear or branched alkyl group having 1 to 4 carbon atoms, an aryl group having a substituent, or an unsubstituted aryl group, and R.sub.4 represents an alkyl group having 1 to 4 carbon atoms; and R.sub.5 and R.sub.6 each independently represent a linear, branched or cyclic alkyl group having 1 to 8 carbon atoms, an alkyl group having a hydroxyl group at the terminal, an aryl group having a substituent, or an unsubstituted aryl group; and R.sub.5 and R.sub.6 may be combined to form a heterocycle.

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 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.