| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology for preventing a spot adhering to a printing sheet due to contamination of a photoreceptor from being missed, while easily acquiring a spot position of the photoreceptor.SOLUTION: A control part of an image forming apparatus includes division lines 51A, 51B for dividing an area in a sheet 3 where a developer image is to be transferred, in an axial direction of a photoreceptor, and executes formation processing for controlling an image forming part and a transfer part so that an identification developer image 50 for identifying an area 54 divided by the division lines 51A, 51B is formed on the sheet 3. The division lines 51A, 51B are broken lines each extending in a sheet conveyance direction and having at least one blank portion 53. |
