| 摘要 |
PROBLEM TO BE SOLVED: To provide a forgery preventive thermographic sheet for rapidly and easily deciding a truth or falsehood of copy information by a simple method without using a special equipment such as a black-light emitting apparatus. SOLUTION: In the forgery preventive thermographic sheet 1 comprising a thermal transfer layer 3 provided at a predetermined part of a surface of a base material 2, the layer 3 is colored at the ambient temperature, and mainly formed of a hot-melt wax containing a temperature indicating agent including a microcapsule to be color erased by heating and/or a thermoplastic resin. |
