An image forming apparatus includes an image forming portion configured to form an image with a liquid developer containing a toner and a carrier liquid, a separating device configured to separate the toner and the carrier liquid from the liquid developer collected at the image forming portion, a first carrier supplying device supplies a first carrier liquid separated by the separating device, and a second carrier supplying device including a second carrier container to accommodate a second carrier liquid in which a ratio of the first substance to the second substance is smaller than that in the first carrier liquid separated by the separating device or no first substance is contained. An accommodating portion accommodates the liquid developer including the first carrier liquid, the second carrier liquid, and the toner, wherein the liquid developer accommodated in the accommodating portion is supplied to the image forming portion.

An image forming method uses a toner including toner particles including a binder resin and an ultraviolet light absorber. Content of the ultraviolet light absorber is within a range of 0.1 to 50 mass % with respect to total mass of the toner particles. The method includes: transferring a toner image formed with the toner on a recording medium; and irradiating the toner image transferred on the recording medium with monochromatic light having a maximum emission wavelength within a wavelength range of 280 to 550 nm to melt and fix the toner image.

A toner concentration adjusting means capable of adjusting a toner concentration, an electroconductive member provided in contact with a developing roller through a liquid developer, a voltage applying means capable of generating a potential difference between the developing roller and the electroconductive member, a current detecting means for detecting a current flowing through between the developing roller and the electroconductive member, and a controller capable of controlling the toner concentration adjusting means and the voltage applying means are provided, and the controller adjusts the toner concentration of the liquid developer on a surface of the developing roller by the toner concentration adjusting means (step S17, 18) depending on a change in detection result by the current detecting means (step S14) when a predetermined potential difference is generated between the developing roller and the electroconductive member by the voltage applying means.

During non-image formation, a setting mode in which a predetermined potential difference is generated by a first voltage applying means (step S5) and depending on a detection result by a current detecting means (step S8), a developing contrast and a fog-removing voltage are set is executable, and during image formation, the potential difference set in the setting mode is generated by at least one of a second voltage applying means, a charging means and an exposure means (steps S9, S10).

A developing roller which is rotatable while carrying a liquid developer containing toner and a carrier liquid and which contains an electroconductive agent, a squeeze roller provided in contact with the developing roller through at least the carrier liquid, a voltage source capable of generating a potential difference between the developing roller and a squeeze roller, a current detecting sensor for detecting a current passed between the developing roller and the squeeze roller, a controller capable of controlling the voltage source, and a display device capable of outputting information on a lifetime of the developing roller are provided, and the controller outputs the information on the lifetime from the display device on the basis of a detection result by the current detecting sensor (steps S5 to S8) when a predetermined potential difference is generated between the developing roller and the squeeze roller by the voltage source (steps S2, S4).

In one example of the disclosure, it is determined that an amount of print agent remaining in a print agent container of a print apparatus is below a threshold level. An amount of print solution is transferred from a print solution reservoir of the print apparatus, or an amount of print solution solvent is transferred from a solvent reservoir of the print apparatus, into the print agent container. At least some of the remaining print agent is caused to dissolve into the amount of print solution or print solution solvent to forma rinse solution. The rinse solution is transferred from the print agent reservoir to the print solution reservoir.

A photo drum may be to receive a color separation. A controller may be to change a location of the color separation on the photo drum from a first location to a second location when a separation location history for the color separation is outside of a threshold range.

In one example, a method for calibrating a position of a charge roller is described. The method may include a processor positioning a first end of a charge roller to a first plurality of index positions, determining a capacitance between the charge roller and a photoconductor imaging plate at each of the first plurality of index positions, determining a first index position of the first plurality of index positions with a greatest change in capacitance, and calibrating a position of the charge roller based upon the first index position.

In a case that a toner concentration of a liquid developer in a mixer is high and a liquid amount is small, when a supply flow rate of a carrier liquid by a carrier supplying pump is set (S38), a carrier amount for concentration adjustment is preferentially assigned (S33 or S35). Then, a remaining one is assigned to a carrier amount for liquid amount adjustment (S36). By doing so, by a non-interacting function, a supply agent to be supplied to the mixer can be made less than a conventional case. That is, the carrier liquid can be supplied by decreasing the supply agent more than the conventional case, so that a liquid amount can be easily satisfied while improving followability of a toner concentration.

An image forming apparatus includes an image bearing member configured to bear a toner image formed using a liquid developer containing toner particles and a carrier liquid, a transfer member, an input portion into which information on a kind of a recording material is inputted, an adjusting device configured to adjust an amount of the carrier liquid of the toner image, and an executing portion configured to execute an operation of the adjusting device depending on the information when the toner image is in the adjusting position. The executing position executes either of a plurality of operations including a first operation in which the amount of the carrier liquid of the toner image is increased, a second operation in which the amount of the carrier liquid is decreased, and a third operation in which the amount of the carrier liquid is not adjusted.