| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a secret information concealing system which is good for prevention of counterfeit credit cards, membership cards, securities, packages and labels, at low cost and with convenience. <P>SOLUTION: The secret information concealing system is constituted of up a covered and concealed printed luminescence ink information (3) with metal vaporized film (4) or metal vaporized foil (5) luminescence ink information (3) is printed with a luminescence ink (2), which includes luminescence materials which emit colors by irradiation with a black light (1). <P>COPYRIGHT: (C)2005,JPO&NCIPI |
