Patent ID: 8155542

Claim:
An image forming apparatus, comprising: an image forming unit including a plurality of functional sections for image formation, each of the functional sections being configured to control an image creation condition, each of the functional sections contributing to image formation in the image creation condition; an image formation control section being configured to control the functional sections to cause the image formation unit to execute image formation processing; a counter counting a cumulative printed-paper number in a series of image formation processing; an image creation condition regulation section regulating an image creation condition of at least one of the functional sections; a controlled printed-paper number storage section storing a benchmark printed-paper number and first allowable value to determine a timing of regulating the image creation condition, the first allowable value being set to be less than the benchmark printed-paper number; and a regulation control section activating the image creation condition regulation section after the series of image formation processing when the cumulative printed-paper number is equal to or greater than the first allowable value after the series of image formation processing, wherein the first allowable value is set to be equal to or greater than 90% of the benchmark printed number and is simultaneously set to be equal to or less than 95% of the benchmark printed number.