| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a peeling and opening preventive medium discriminating forgery or alteration with high accuracy even in conductivity inspection for peeling or re-affixing. <P>SOLUTION: The peeling preventive medium 1 is formed by welding a lower laminate and an upper laminate. The lower laminate is formed by laminating a lower substrate 2, a first adhering image receiving layer 4, and a first conductive layer 5. The upper laminate is formed by laminating an upper substrate 3, a second adhering image receiving layer 4' and a second conductive layer 5'. By imparting conductivity through irradiating, with flash light, the peripheral area of matrix printing image lines X, Y, Z formed of a vertical image line and a horizontal image line printed in a metal nano-ink and carrying it as information, the conductivity of the crossing part of the point Z is worsened and electric conductivity between the first conductive layer 5 and the second conductive layer 5' is lost when peeled. Both ends of each of the matrix printing image lines of the first conductive layer 5 and the second conductive layer 5' forming the conductive part are referred to as measuring terminals A, B, C, D, E, F, G, H and, by measuring the relations between the combination of the terminals and conduction by using a resistance measuring instrument 6, the state of alteration is detected. <P>COPYRIGHT: (C)2010,JPO&INPIT |
