An image formation apparatus includes a printer configured to perform a printing process including transporting a recording medium and printing an image on the transported recording medium, and a hardware processor which determines whether the recording medium is only one sheet to be printed, and, depending on a result thereof, changes a time at which the printing process is started. Changing the time includes causing the printer to start the printing process when a first start print time is reached in a case in which the hardware processor determines that there is only one sheet to be printed, and causing the printer to start the printing process when a second start print time later than the first start print time is reached in a case in which the hardware processor determines that there is not only one sheet to be printed.

An image formation apparatus includes a printer configured to perform a printing process including transporting a recording medium and printing an image on the transported recording medium, and a hardware processor which determines whether the recording medium is only one sheet to be printed, and, depending on a result thereof, changes a time at which the printing process is started. Changing the time includes causing the printer to start the printing process when a first start print time is reached in a case in which the hardware processor determines that there is only one sheet to be printed, and causing the printer to start the printing process when a second start print time later than the first start print time is reached in a case in which the hardware processor determines that there is not only one sheet to be printed.

A discharging method used in an image forming apparatus includes discharging, with an exposure device, an exposure range of the latent image bearer, and discharging, with a discharger, an area of the latent image bearer outside the exposure range and inside a developing range in a main scanning direction. The exposure range is inside the developing range in the main scanning direction. The discharging with the exposure device and the discharging with the discharger are performed when a rotation of the latent image bearer is stopped after a toner image is transferred from the latent image bearer.

A discharging light quantity adjusting device includes a potential measurement controller that performs: a process of causing a first toner image forming process to charge an image holding member to a first potential and an electrometer to measure an electrostatic potential on the image holding member to obtain a first value, a process of causing a second toner image forming process to charge the image holding member to a second potential and removing a toner image formed by the second toner image forming process, and a process of causing a third toner image forming process to charge the image holding member to a third potential, and causing the electrometer to measure an electrostatic potential on the image holding member to obtain a second value; and a light quantity adjusting unit that adjusts a quantity of a discharging light based on the first and second values.

A discharging light quantity adjusting device includes a potential measurement controller that performs: a process of causing a first toner image forming process to charge an image holding member to a first potential and an electrometer to measure an electrostatic potential on the image holding member to obtain a first value, a process of causing a second toner image forming process to charge the image holding member to a second potential and removing a toner image formed by the second toner image forming process, and a process of causing a third toner image forming process to charge the image holding member to a third potential, and causing the electrometer to measure an electrostatic potential on the image holding member to obtain a second value; and a light quantity adjusting unit that adjusts a quantity of a discharging light based on the first and second values.

An image formation apparatus includes a printer configured to perform a printing process including transporting a recording medium and printing an image on the transported recording medium, and a hardware processor which determines whether the recording medium is only one sheet to be printed, and, depending on a result thereof, changes a time at which the printing process is started. Changing the time includes causing the printer to start the printing process when a first start print time is reached in a case in which the hardware processor determines that there is only one sheet to be printed, and causing the printer to start the printing process when a second start print time later than the first start print time is reached in a case in which the hardware processor determines that there is not only one sheet to be printed.

In an image forming apparatus, a correction control unit of an image clock control unit controls the frequency of an image clock, so that the partial magnification of each position in an image region in which an image is formed is corrected in a main scanning direction that is a direction in which a laser beam scans a scanning region of one line. When controlling the frequency of the image clock, the correction control unit makes the change rate (the slope) that is a change amount of the image clock per unit time, be smaller in a non-image region being a region other than the image region, than the change rate in the image region.