The same matter is applied and forgeryproof genuiness determination method

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PROBLEM TO BE SOLVED : To provide a printed matter applied with forgery-preventing measures which make forgery and duplication difficult and moreover facilitate the determination of authenticity. SOLUTION : The intaglio printed matter is applied with the forgery-preventing measures having a latent image part which is constituted of a liner-patterned projection including a printing image having a prescribed pitch and a line width and extending in one direction and a background which is constituted of a liner-patterned projection including a printing image having almost the same pitch and the line width as the printing image of the latent image part and extending in the direction intersecting the printing image of the latent image part. The printing images are formed partially at least of a first ink which contains a lanthanoid rare-earth compound. COPYRIGHT : (C)2008, JPO&INPIT