| 摘要 |
PROBLEM TO BE SOLVED: To prevent a falsification of describing information by obtaining copying information due to mixed color of colors difficult to be reproduced by any method for coloring by making a plurality of color couplers affect a developer. SOLUTION: A coupler microcapsule layer 12, in which a microcapsule containing a first color coupler for color developing in contact with a developer and a microcapsule containing a second color coupler for color developing in color different from color developing by the first coupler are mixed, is provided on a developer part 10 provided on opposed surface of an upper sheet piece 2 and a lower sheet piece 3, and an upper sheet piece side self-color developing part 11 and lower sheet piece side self-color developing part 13 are formed. Thus, information described from the piece 2 side by folding is simultaneously copied on the part 11 and the part 13 with mixing color of the color developing by the first coupler and the color developing by the second coupler. |
