| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image forming system, an image forming apparatus and a density correction method for efficiently correcting density. <P>SOLUTION: In S1, a CPU 77 acquires this time factor information. In S2, the CPU 77 reads from an NVRAM 83 previous factor information acquired during the previous calibration process. In S3, it is judged whether an index difference between the this time factor information and the previous factor information is smaller than a threshold value X or not. On the basis of the amount of change in the index of the factor information, the number of marks is determined and density patches P having density marks D different from each other in density and equal to the number of the marks are formed on a belt 3 for each of color. <P>COPYRIGHT: (C)2008,JPO&INPIT |
