| 摘要 |
In an image forming apparatus that uses an intermediate transfer system are provided a paper supply portion that stores a sheet of paper on which image forming is carried out, an image forming system that carries out image forming on the sheet of paper transported from the paper supply portion, and a detection portion that detects the number of sheets of paper stored in the paper supply portion, and image writing for carrying out image forming onto the sheet of paper is carried out in the image forming system before the sheet of paper stored in the paper supply portion is transported to the image forming system. In the image forming apparatus, upon detecting with the detection portion that the number of sheets of paper stored in the paper supply portion is not more than a preset number of sheets excluding zero sheets, an image writing sequence in the image forming system is changed in response to the detection in order to avoid development by developer. Furthermore, a plurality of image forming portions are provided in the image forming system and the image forming portion or portions to be used is selected depending on a specified printing mode, and the change in the image writing sequence is carried out depending on the printing mode.
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