| 摘要 |
PROBLEM TO BE SOLVED: To appropriately perform monochrome and color density correction, in particular, to further reduce the undesired monochrome density correction, then, to suppress toner deterioration, and also, to suppress a reduction in printing speed due to an interruption caused by the density correction. SOLUTION: The image forming apparatus includes: a storage device 12 that stores print ratio data 32 measured with time; and a print engine 11 that individually perform the monochrome density correction and the color density correction on the basis of a prescribed first condition (e.g., condition concerning the integrated value of the number of printed sheets or the printing periods). If the first condition in the monochrome printing is met, the print engine 11 does not perform the monochrome density correction if a predetermined second condition concerning an amount of variation in the print ratio identified from the print ratio data is also met, on the other hand, if the second condition is not met, perform the monochrome density correction. COPYRIGHT: (C)2011,JPO&INPIT
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