According to an embodiment, an image processing system includes an image forming unit, a decoloring unit, a storage device, an operation panel and a processor. The storage device stores image data of a plurality of printed materials. The processor forms on a sheet an image based on image data in a page range of the printed material received by the operation panel. The processor determines whether or not images of all pages in the page range have been decolored in a predetermined range after the image formation is executed when the formed image is decolored by the decoloring unit.

An information processing apparatus manages a remaining number of sheets on which image forming is permitted, in an image-forming apparatus that forms images on sheets by using a consumable material, obtains first determination information for determining whether a holding device holding the consumable material is a first holding device or a second holding device, and determines, in a case where refilling the image-forming apparatus with the consumable material from the holding device is performed, whether the holding device used for the refilling is the first holding device, based on the first determination information of the holding device, and determines a refill amount of the consumable material with which the image-forming apparatus has been refilled.

A fixing device includes a fixing member, a pressing member, a charger, and adjusting part. The fixing member heats toner images on media. The pressing member forms nips with the fixing member and presses the media. The charger uses a corona discharge that occurs in an electric field generated around a discharging electrode so as to charge the fixing member to a same polarity of toner in the toner images. The adjusting part increases a bias applied to the discharging electrode in accordance with increase of a cumulative number calculated by accumulating a number of the media on which the toner images are fixed or increase of a cumulative printing amount calculated by multiplying a printing rate that indicates a ratio of an area of the toner images to an area of the media by the cumulative number.

A fixing device includes a fixing member, a pressing member, a charger, and adjusting part. The fixing member heats toner images on media. The pressing member forms nips with the fixing member and presses the media. The charger uses a corona discharge that occurs in an electric field generated around a discharging electrode so as to charge the fixing member to a same polarity of toner in the toner images. The adjusting part increases a bias applied to the discharging electrode in accordance with increase of a cumulative number calculated by accumulating a number of the media on which the toner images are fixed or increase of a cumulative printing amount calculated by multiplying a printing rate that indicates a ratio of an area of the toner images to an area of the media by the cumulative number.

A charge calculation apparatus includes: a consumed amount acquisition section that acquires an amount of a consumable consumed for printing in a first period; a carried-forward amount calculation section that calculates a carried-forward amount of the consumable on a basis of the consumed amount and a base amount of the consumable for the first period; and a charge calculation section that calculates an amount of money charged for printing on a basis of the carried-forward amount. The consumed amount acquisition section acquires a second consumed amount that is an amount of the consumable consumed for printing in a second period that is posterior to the first period. The charge calculation section calculates the amount of money charged for the second period on a basis of the second consumed amount, a second base amount that is a base amount of the consumable for the second period, and the carried-forward amount.

An image forming apparatus includes a detection section, an identification section, an acquisition section and a restriction section. The detection section detects an approach of a user. The identification section identifies the user detected by the detection section. The acquisition section acquires statistics determined from a use count of the user identified by the identification section. The restriction section restricts execution of a warm-up control based on the statistics acquired by the acquisition section.

Provided is an image forming apparatus capable of counting a number of prints with high accuracy and a recording medium. An MFP that includes a monochrome counter for monochrome printing and a color counter for color printing sets the monochrome counter as a target counter for reflecting the number of prints in a printing process when only monochrome toner of monochrome toner and color toner is consumed in the printing process. Moreover, the MFP sets the color counter as a target counter when color toner is consumed in a printing process. Then, the MFP reflects the number of prints in a printing process on the set target counter.

Provided is an image forming apparatus capable of counting a number of prints with high accuracy and a recording medium. An MFP that includes a monochrome counter for monochrome printing and a color counter for color printing sets the monochrome counter as a target counter for reflecting the number of prints in a printing process when only monochrome toner of monochrome toner and color toner is consumed in the printing process. Moreover, the MFP sets the color counter as a target counter when color toner is consumed in a printing process. Then, the MFP reflects the number of prints in a printing process on the set target counter.

An image forming apparatus includes an image carrying member, a charging device, an exposure device, a developing device, and a control section. The developing device includes a development container for containing a non-magnetic one-component developer composed only of a toner, a developer carrying member having an outer circumferential surface on which a toner layer is formed, and a regulation blade that regulates a thickness of the toner layer. The control section executes speed reduction control to reduce a rotation speed of the developer carrying member at a time of warming-up before image formation to a first speed lower than a reference speed at a time of the image formation. In the speed reduction control, the control section raises the rotation speed of the developer carrying member at a first acceleration rate until the first speed is reached from a state where rotation of the developer carrying member is stopped.

An image forming apparatus includes an image carrying member, a charging device, an exposure device, a developing device, and a control section. The developing device includes a development container for containing a non-magnetic one-component developer composed only of a toner, a developer carrying member having an outer circumferential surface on which a toner layer is formed, and a regulation blade that regulates a thickness of the toner layer. The control section executes speed reduction control to reduce a rotation speed of the developer carrying member at a time of warming-up before image formation to a first speed lower than a reference speed at a time of the image formation. In the speed reduction control, the control section raises the rotation speed of the developer carrying member at a first acceleration rate until the first speed is reached from a state where rotation of the developer carrying member is stopped.