Abstract: An image forming apparatus includes an image carrier unit, an image display control unit, and a forming unit. The image carrier unit holds images formed from a developer. The images include an image intended to be transferred to a medium and an image unintended to be transferred to the medium. The image display control unit causes a display unit to display an image asking whether the image unintended to be transferred is to be formed when a predetermined condition for forming the image unintended to be transferred is satisfied. The forming unit forms the image unintended to be transferred to the medium when a command of forming the image unintended to be transferred to the medium is input to a display on the display unit.

Abstract: An image forming apparatus includes: an image holding section; a transfer section that includes a transfer member, applies a transfer electric-field to a transfer region between the image holding section and the transfer member, and electrostatically transfers an image held by the image holding section onto a recording medium; a contact section that acts as an electrode to ground while being in contact with the recording medium when the recording medium passes through the transfer region; a first resistance detection section; a second resistance detection section; a comparison section that compares a first system resistance detected by the first resistance detection section with a second system resistance detected by the second resistance detection section; and a switching section that switches between constant voltage control and constant current control for the transfer electric-field produced by the transfer section depending on a result of comparison by the comparison section.

Abstract: An image forming apparatus includes: an image holding section; a transfer section that has a transfer member, applies a transfer electric-field to a transfer region between the image holding section and the transfer member, and electrostatically transfers an image held by the image holding section onto a recording medium; contact sections that act as electrodes to ground while being in contact with the recording medium; a humidification section that is provided upstream of the transfer region and humidifies the recording medium; a first control section that performs control without humidification by the humidification section; a second control section that performs control to cause the humidification section to humidify the recording medium; and a selection section that selects the first control section or the second control section depending on a type of the recording medium.

Abstract: An image forming apparatus includes an image holding unit that holds an image that is formed of a developer, the image being intended to be transferred onto a medium, and an image that is not intended to be transferred onto a medium, a transfer unit that transfers the image that is intended to be transferred onto a medium onto a medium, and a forming unit that forms, upon receiving a print instruction to form the image that is intended to be transferred onto a medium onto the image holding unit, the image that is not intended to be transferred onto a medium at a position on the image holding unit where the image that is intended to be transferred onto a medium is to be formed.

Abstract: An image forming apparatus includes: an image holding section; a transfer section that has a transfer member, applies a transfer electric-field to a transfer region between the image holding section and the transfer member, and electrostatically transfers an image held by the image holding section onto a recording medium; contact sections that act as electrodes to ground while being in contact with the recording medium; a humidification section that is provided upstream of the transfer region and humidifies the recording medium; a first control section that performs control without humidification by the humidification section; a second control section that performs control to cause the humidification section to humidify the recording medium; and a selection section that selects the first control section or the second control section depending on a type of the recording medium.

Abstract: An image forming apparatus includes: an image holding section; a transfer section that includes a transfer member, applies a transfer electric-field to a transfer region between the image holding section and the transfer member, and electrostatically transfers an image held by the image holding section onto a recording medium; a contact section that acts as an electrode to ground while being in contact with the recording medium when the recording medium passes through the transfer region; a first resistance detection section; a second resistance detection section; a comparison section that compares a first system resistance detected by the first resistance detection section with a second system resistance detected by the second resistance detection section; and a switching section that switches between constant voltage control and constant current control for the transfer electric-field produced by the transfer section depending on a result of comparison by the comparison section.

Abstract: An image forming apparatus includes an intermediate transfer unit that holds an image to be transferred onto a recording medium, a base image formation unit that forms a planar base image onto the intermediate transfer unit by using an opaque base image forming agent, the base image being brought into contact with and disposed onto an entire surface of the recording medium or a partial region of the surface of the recording medium, a transparent image formation unit that forms a transparent image onto the intermediate transfer unit by using a transparent image forming agent, a first control unit that performs control for transferring a monochromatic or polychromatic image including the base image formed on the intermediate transfer unit by the base image formation unit onto the recording medium, a second control unit that performs control for superposing a monochromatic or polychromatic image including the base image formed by the base image formation unit onto the transparent image formed on the intermediate

Abstract: An image forming apparatus includes a transfer unit that transfers a toner image to a transfer body; a guide unit disposed upstream of the transfer unit in a direction in which the transfer body is transported, the guide unit guiding the transfer body; a supply unit that supplies a transfer voltage to the transfer unit; and a setting unit that sets the transfer voltage supplied by the supply unit so that a transfer current supplied to the transfer unit is within a predetermined range at the time when the transfer body becomes separated from the guide unit.

Abstract: An image forming apparatus includes an intermediate transfer unit that holds an image to be transferred onto a recording medium, a base image formation unit that forms a planar base image onto the intermediate transfer unit by using an opaque base image forming agent, the base image being brought into contact with and disposed onto an entire surface of the recording medium or a partial region of the surface of the recording medium, a transparent image formation unit that forms a transparent image onto the intermediate transfer unit by using a transparent image forming agent, a first control unit that performs control for transferring a monochromatic or polychromatic image including the base image formed on the intermediate transfer unit by the base image formation unit onto the recording medium, a second control unit that performs control for superposing a monochromatic or polychromatic image including the base image formed by the base image formation unit onto the transparent image formed on the intermediate

Abstract: An image forming apparatus includes an image holding unit, a transfer unit, a first-resistance detection unit, a second-resistance detection unit, and a selection unit. The image holding unit holds an image. The transfer unit includes a transfer member and a counter member. The transfer member is disposed in contact with an image holding surface of the image holding unit. The counter member is disposed across the image holding unit from the transfer member. The counter member is connected to a transfer power supply to cause a transfer electric field to act on a transfer region between the image holding unit and the transfer member. The transfer unit causes the image held by the image holding unit to be electrostatically transferred onto a recording medium transported to the transfer region. The first-resistance detection unit detects system resistance of the counter member, the image holding unit, and the transfer member.

Abstract: An image forming apparatus includes a transfer unit that transfers a toner image to a transfer body; a guide unit disposed upstream of the transfer unit in a direction in which the transfer body is transported, the guide unit guiding the transfer body; a supply unit that supplies a transfer voltage to the transfer unit; and a setting unit that sets the transfer voltage supplied by the supply unit so that a transfer current supplied to the transfer unit is within a predetermined range at the time when the transfer body becomes separated from the guide unit.