An image forming apparatus includes a first image forming unit that forms a yellow image by an electrostatic charge image developing yellow toner; a second image forming unit that forms a magenta image by an electrostatic charge image developing magenta toner; a transfer unit that transfers the yellow image and the magenta image to a recording medium; and a fixing unit that fixes the yellow image and the magenta image to the recording medium, wherein a maximum absorption wavelength λmax (M) of the electrostatic charge image developing magenta toner at a wavelength of 360 nm to 760 nm is from 530 nm to 580 nm, and when an absorbance of the maximum absorption wavelength λmax (M) is standardized to 1, an absorbance at a wavelength of 450 nm is 0.20 or less and an absorbance at a wavelength of 400 nm is 0.10 or less.

A liquid electro-photographic printing system, comprising: a binary ink developer assembly, a power supply arrangement, a switching arrangement, and a controller. The binary ink developer assembly includes a plurality of members defining a flow path for a printing fluid containing charged particles, the plurality of members including a first member and a second member that are arranged to generate an electric field therebetween, the first member having a plurality of segments. The power supply arrangement continuously provides a supply of voltages during a print operation, the voltages including a first voltage and a second voltage having a different voltage level from that of the first voltage. The switching arrangement switches the supply of voltages to the segments of the first member on an individual segment basis, to cause charged particles to be attracted to the first member in the individual segment when the first voltage is supplied to the individual segment and to cause charged particles to be repelled from the first member in the individual segment when the second voltage is supplied to the individual segment. The controller to determine timing of when to switch the supply of voltages to the segments.

An image forming apparatus includes a controller capable of executing a normal mode in which an electrostatic image formed on an image bearing member is developed by setting a peripheral velocity ratio of a developer bearing member relative to the image bearing member to a prescribed peripheral velocity ratio, and a color gamut enlargement mode in which a color gamut of an image to be formed on a recording medium is enlarged as compared to the normal mode by setting the peripheral velocity ratio of the developer bearing member relative to the image bearing member to a larger peripheral velocity ratio than the peripheral velocity ratio in the normal mode, wherein the controller identifies image color gamut information included in image data and forms an image by selecting the normal mode or the color gamut enlargement mode in accordance with the image color gamut information.

A powder container includes a discharge port, and a container identifier shape portion provided on a front end surface of the powder container in an insertion direction and that functions to identify a type of the powder container, the insertion direction being a direction in which the container body is inserted. The powder container further includes a driven portion that interlocks with a first main-body interlocking portion of the image forming apparatus at the time of setting in the main body of the image forming apparatus, and an identifier opening group that starts to interlock with a second main-body interlocking portion of the image forming apparatus after the driven portion starts to interlock with the first main-body interlocking portion. A position of the identifier opening group relative to the driven portion in the circumferential direction varies depending on a type of the powder container to be identified.

An image processing apparatus includes: a determining unit configured to determine a parameter for image processing for a special toner plate depending on a type of a special toner other than a process color toner; and an image processing unit configured to process an image of the special toner plate using the determined parameter.

In an image forming apparatus, a controller performs processes in accordance with an operation mode settable to one of a first subscription mode and a second subscription mode. The first subscription mode corresponds to a first subscription in which a specific-color cartridge is a subscription subject and a non-specific-color cartridge is not the subscription subject. The second subscription mode corresponds to a second subscription in which both the specific-color cartridge and the non-specific-color cartridge are the subscription subject. The controller performs restricting usage of the non-specific-color cartridge in a case where the first subscription mode is set as the operation mode and the type information of the non-specific-color cartridge indicates the subscription type, compared to a case where the second subscription mode is set as the operation mode and the type information of the non-specific-color cartridge indicates the subscription type.

An image forming device includes a housing; a conveying belt, and a retaining member. The retaining member retains image bearing members that juxtaposed with and spaced apart from one another. The retaining member is slidingly movable relative to the housing in a direction that the image bearing members are juxtaposed. The retaining member retains the image bearing members to confront the conveying belt. The image bearing members and the conveying belt are arranged in a reference direction. The retaining member includes a cleaning member that removes residual developing agent from the conveying belt, and a guide unit that guides the recording medium to the conveying belt. The guide unit is located on the image bearing member side and the cleaning member is located on the conveying belt side. At least part of the guide unit overlaps at least part of the cleaning member when projected in the reference direction.

An image forming apparatus includes a main body casing; a first drum unit including a first photosensitive drum configured to rotate about an axis extending in a first direction; a second drum unit including a second photosensitive drum configured to rotate about an axis extending in the first direction; a belt; a cleaning member configured to clean the belt; an auger configured to convey waste toner cleaned by the cleaning member; a first toner cartridge including a first new toner containing unit configured to supply new toner and a waste toner containing unit configured to contain the waste toner conveyed by the auger; and a second toner cartridge including a second new toner containing unit configured to supply new toner to the second drum unit. The waste toner containing unit is aligned with the first new toner containing unit in a second direction perpendicular to the first direction.

A developing cartridge includes: a developing roller; a coupling for rotating the developing roller; a shaft; and a clutch. The developing roller is rotatable about a first axis extending in an axial direction. The coupling is rotatable about a second axis extending in the axial direction. The shaft rotatably supports the coupling. The clutch is rotatable together with the coupling about the shaft in a case where the coupling rotates in a first rotational direction. In a case where the coupling rotates in a second rotational direction opposite to the first rotational direction, the clutch engages with a portion of the shaft and the clutch and the coupling do not rotate.

A cyan toner is provided. The cyan toner comprises toner particles each comprising a binder resin and a colorant. From 1.0% to 20.0% by number of the toner particles have a CH rate of 7.0% or more in absolute value. The CH rate is calculated from the following formula (1):

CH rate (%)=[(I.sub.n−I.sub.ave)/I.sub.ave]×100  Formula (1)

where, in a Raman spectrum of each toner particle, I.sub.n represents an integrated intensity within a wavenumber region of from 2,600 to 3,180 cm.sup.−1 when an intensity at a wavenumber λ within a wavenumber region of from 2,600 to 2,800 cm.sup.−1 is s normalized to 1, where a total intensity of all the toner particles is maximum at the wavenumber λ; and I.sub.ave represents an average of the I.sub.n.