| 摘要 |
PROBLEM TO BE SOLVED: To produce an invisible information print sheet which can reveal invisible information easily and can be handled hygienically without producing any chip by forming a selfcoloring part of a desensitizer being patterned while imaging invisible information and a microcapsule agent containing dye being laminated directly onto a developer layer while covering the pattern. SOLUTION: A desensitizer 9 imaging invisible information with a negative pattern is provided on a developer layer 8 formed on a sheet 2. A microcapsule agent 10 containing dye is then provided covering a part 11 where invisible information is formed by the desensitizer 9 or covering the desensitizer 9 entirely. A part of the developer layer 8 directly laminated with the microcapsule agent 10 containing dye serves as a self-coloring part 7. When the self-coloring part 7 of such a sheet is pressed from the outside, the microcapsule agent 10 containing dye is destroyed and the dye reacts on the developer. On the other hand, the dye does not react on the developer at the part shielded by the desensitizer 9 and thereby the self-coloring part 7 develops a color thus revealing the invisible information. |
