An image forming apparatus includes: an image forming unit that forms an image with a brilliant toner on a recording medium; a medium color determiner that determines whether the recording medium is white or colored; and an image forming controller that controls the image forming unit. When the medium color determiner determines that the recording medium is colored, the image forming controller increases an amount of the brilliant toner per unit area of the image formed on the recording medium as compared to when the recording medium is white.

An image forming method includes supplying powder having metallic luster on a resin image arranged on a recording medium, wherein a color value of the resin image and a color value of the powder on the recording medium satisfy the following Equation (1):

{(L*.sub.p−L*.sub.i−40).sup.2+(a*.sub.p−a*.sub.i).sup.2+(b*.sub.p−b*.sub.i).sup.2}.sup.1/2≤20  (1)

wherein L*.sub.p, a*.sub.p, and b*.sub.p represent color values of the powder, and
L*.sub.i, a*.sub.i, and b*.sub.i represent color values of the resin image on the recording medium.

An electrostatic charge image developing toner set includes a toner A that contains a binder resin A and a dye, and a white toner B that contains a binder resin B and a titanium oxide pigment, in which an absolute value of a difference (ΔSP value) in solubility parameter between the binder resin A contained in the toner A and the binder resin B contained in the white toner B is 0.5 or greater.

An electrostatic charge image developing toner includes a toner particle that contains a silicon phthalocyanine dye and a zirconium oxide particle.

An antimicrobial toner particle composition is disclosed. The antimicrobial toner particle composition includes a binder resin, and an antimicrobial material in an effective antimicrobial amount comprising copper oxide. An image forming apparatus is also disclosed, capable of forming a fused antimicrobial image on a recording medium.

An example photodetector for detecting fluorescent toner includes a light emitting unit to emit light to a toner image, and a light receiving unit. The light receiving unit is to detect visible light reflected by the toner image, detect that the toner image includes the fluorescent toner based on the detection of the visible light, the visible light generated by the fluorescent toner and having a predetermined wavelength band different from a wavelength band of the emitted light, and output a signal corresponding to the detection of the fluorescent toner.

An image forming apparatus includes a developing unit, a transferring unit, and a fixing unit. The developing unit performs an attachment process in which the developing unit attaches a luminescent toner to a latent image that is formed on a basis of image data. The transferring unit performs a transfer process in which the transferring unit transfers, onto a medium, the luminescent toner attached to the latent image. The fixing unit performs a fixing process in which the fixing unit fixes, to the medium, the luminescent toner transferred onto the medium. The attachment process performed by the developing unit and the transfer process performed by the transferring unit are each performed plural times for the medium, on the basis of the image data.

An imaging system includes a toner image forming device and a gloss treatment device. The toner image forming device accommodates a color toner that forms a color toner image on a printing medium, and which accommodates a clear toner that forms a clear toner image on the printing medium. The clear toner has a wax content that is lower than a wax content of the color toner. The gloss treatment device melts the clear toner on the printing medium to apply gloss treatment to the printing medium including the color toner image and the clear toner image.

A glittering toner includes: a flat metallic pigment having a surface coated with a resin; a polyester-styrene acrylic composite resin; and a polyester resin. When a solubility parameter of the polyester-styrene acrylic composite resin is represented by SP1 (cal/cm.sup.3).sup.1/2 and a solubility parameter of the polyester resin is represented by SP2 (cal/cm.sup.3).sup.1/2, the SP1 and the SP2 satisfy a relational expression (1): [SP2−SP1>0.3] and the SP1 satisfies a relational expression (2): [10<SP1].

Provided is a toner including at least: a binder resin; and a release agent, wherein in a transmission electron microscopic (TEM) image of a torn cross-section of the toner, the release agent has an acicular or filiform shape and an average aspect ratio of 31 or greater, and wherein a displacement amount of the toner when 250 micronewtons is applied to the toner in a microcompression test is 700 nm or less.