| 摘要 |
PROBLEM TO BE SOLVED: To provide a concealed postcard, which is easy to use and the duplicate of recorded contents of which can be taken with no increase of cost. SOLUTION: This postcard is equipped with a duplicate piece 16, in which necessary matters can be recorded, a postcard body 11, to which the information recorded on the duplicate piece 16 is copied, and a concealing piece 12 for concealing the information (one, with which an individual can be specified, ) copied to the postcard body 11. The concealing piece 12 is equipped with a concealing piece body 13, a re-releasable self-adhesive layer 14, which is formed on one side of the concealing piece body 13 pseudo-bonds re-releasably, and a releasing paper 15 for protecting the re-releasable self-adhesive layer 14. A copying structure 17 is equipped with a color developing layer 17a, in which a color developing agent is sealed in microcapsules, and a developer layer 17b produced by coating a developer. COPYRIGHT: (C)2004,JPO
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