| 摘要 |
PROBLEM TO BE SOLVED: To provide an information recording medium, with which the recording and reading of visible and invisible information can easily be executed with good productivity, which has no limitation of design and is excellent in usage characteristics such as the repeatability of recording and erasing and in security properties. SOLUTION: An information recording medium 80, which is formed by providing a reversible heat sensitive recording layer 2 on at least one side of a base material sheet 1 and further providing a hiding layer 3, which transmits infrared rays and, at the same time, absorbs or scatters visible light so as to hide an information recorded in a lower layer. Further, a pattern printed layer 4 is provided on the hiding layer 3 and preferably a protective layer 5 is provided as the outermost layer. Furthermore, at the portion, in which no reversible heat sensitive recording layer 2 is provided, a magnetic recording layer 6 can also be provided. |
