To suppress the risk of ink bleeding and thereby attain an improved printing quality, a printing apparatus 10 is provided that carries out an inkjet printing operation for a medium 50. The printing apparatus 10 includes inkjet heads 102 that eject droplets of ink using inkjet technique; and ultraviolet light sources 104 that radiate ultraviolet light. The ink ejected from the inkjet heads 102 contains an ultraviolet absorbent that absorbs ultraviolet light, and a solvent that dissolves or disperses the ultraviolet absorbent. The ejected ink is adherable to the medium 50 and fixable by evaporating the solvent. The ultraviolet light sources 104 irradiate the ink adhered to the medium 50 with ultraviolet light so as to volatilize and remove at least part of the solvent from the ink.

The liquid discharging device includes a transporting unit disposed in a housing and configured to transport a medium placed outside the housing, a discharging unit configured to discharge liquid to the medium, a pre-heater configured to heat the medium and located upstream from a position where liquid is discharged by a discharging unit in a transport direction in which the medium is transported, an after-heater configured to heat the medium and located downstream, in the transport direction, from the position where the liquid is discharged, a detector configured to detect humidity outside the housing, and a control unit configured to control the pre-heater, wherein the medium is applied by a tension between a portion that contacts the transporting unit upstream from a position where the liquid is discharged in the transport direction, and a portion located downstream from the after-heater, and the control unit controls the pre-heater based on the humidity.

A heating device includes rollers, a heating belt, a heater and a hardware processor. The heating belt is in partial contact with an image generation face of a recording medium and extends over the rollers and circulating in cooperation with the rollers. The heater heats the heating belt. The hardware processor modifies an area of contact between the recording medium and the heating belt. At least two rollers are disposed along a traveling direction of the heating belt and are urged to the recording medium with intermediation of the heating belt. The hardware processor modifies the area of the contact by modifying a distance between a first roller and a second roller among the at least two rollers, the first and second rollers being respectively disposed most upstream and most downstream in the travelling direction of the heating belt.

A printing device includes an ink container, an ink in the ink container, the ink containing an aqueous clear ink and an aqueous color ink and a heating device configured to heat a substrate, wherein the relationship is satisfied, |S.sub.CLS.sub.C5 mN/m, where S.sub.CL represents the surface tension of the aqueous clear ink and S.sub.C represents the surface tension of the aqueous color ink, wherein the printing device has a low gloss printing and a high gloss printing mode, wherein the heating device heats the substrate while satisfying the relationship: Tlow>Thigh, where Tlow represents the temperature of the substrate in a low gloss printing region in which the aqueous clear ink is printed in the low printing mode and Thigh represents the temperature of the substrate in a high gloss printing region in which the aqueous clear ink is printed in the high printing mode.

A heating device includes a pre-heater configured to pre-heat a medium, onto which a liquid is discharged from a liquid discharger, at a first position upstream of the liquid discharger in a conveyance direction of the medium, a print-heater configured to heat the medium at a second position opposite the liquid discharger, a post-heater configured to post-heat the medium at a third position downstream of the second position in the conveyance direction, and circuitry configured to control a temperature of each of the pre-heater, the print-heater, and the post-heater. The pre-heater includes a first pre-heater and a second pre-heater disposed closer to the print-heater than the first pre-heater, and the circuitry controls a temperature of the second pre-heater to be between a temperature of the first pre-heater and the temperature of the print-heater.

A recording apparatus according to an embodiment may include: a control unit that controls a medium conveyance unit to unwind the wound medium and convey the medium, a recording unit to record an image of recording agent on the medium, and a drying unit to dry the image of the recording agent in a first drying zone and a second drying zone downstream from the first drying zone. Upon causing the recording unit to record a second image after having caused the recording unit to record a first image, the control unit causes the drying unit to dry the recording agent of the first image in the first drying zone, and convey the medium in a direction opposite to the conveyance direction to a predetermined position downstream from the recording unit, and thereafter causes the recording unit to apply the recording agent of the second image to the medium.

An inkjet recording apparatus has a recording head, a thermal head, and a heat control portion. The recording head has an ink discharge surface. The thermal head is arranged opposite the ink discharge surface across a recording medium conveyance passage, and heats the recording medium. The thermal head is provided with a plurality of element arrays in the width direction, the element arrays each having a plurality of heating elements arrayed in the recording medium conveyance direction. The heat control portion makes generate heat at least some heating elements in the element arrays corresponding to the ink discharge ports through which ink is discharged.

To suppress the risk of ink bleeding and thereby attain an improved printing quality, a printing apparatus is provided that carries out an inkjet printing operation for a medium. The printing apparatus includes inkjet heads that eject droplets of ink using inkjet technique; and ultraviolet light sources that radiate ultraviolet light. The ink ejected from the inkjet heads contains an ultraviolet absorbent that absorbs ultraviolet light, and a solvent that dissolves or disperses the ultraviolet absorbent. The ejected ink is adherable to the medium and fixable by evaporating the solvent. The ultraviolet light sources irradiate the ink adhered to the medium with ultraviolet light so as to volatilize and remove at least part of the solvent from the ink.

An image forming apparatus includes a plurality of heaters, a plurality of temperature sensors, an object sensor, and control circuitry. The temperature sensors are formed at positions corresponding to the heaters. The object sensor is configured to detect an overlap region of a medium and the heaters. The control circuitry is configured to correct temperature information acquired by the temperature sensors, according to the overlap region detected by the object sensor and the positions of the temperature sensors, and control the heaters based on the corrected temperature information.

Provided is a printer that includes a transport unit configured to transport a printing medium; a detection unit configured to detect a transport direction in which the printing medium is transported by the transport unit and a transport amount of the printing medium; and a control unit that makes the transport unit transport the printing medium after the printing of the first image, makes the detection unit detect the transport direction and the transport amount of the printing medium, determines a transport direction in which the printing medium is to be transported and a transport amount of the printing medium to be transported based on the detected transport direction and the detected transport amount, and makes the transport unit transport the printing medium based on the above determined transport direction and transport amount before printing a second image which is formed an image subsequent to the first image.