| 摘要 |
PROBLEM TO BE SOLVED: To provide a test pattern where the deviation value between yellow Y, magenta M, cyan C and black K which are formed so as to be superposed can be clearly detected. SOLUTION: In a line image pattern formed by deviating the writing timing in a main scanning direction and/or a sub scanning direction, a toner image of line Y formed by an image forming means for Y in the test pattern is formed so as to be superposed within a matte patch range by M or C toner. |
