| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exudative printing ink for a printing technique forming a solid matrix by effective drying and maintaining sensitivity to solvents and other chemicals, and security protective documents at least partially printed with the ink. <P>SOLUTION: The exudative ink can be printed by dry or wet offset printing or letterpress. The ink contains an organic solvent and at least one dye having sensitivity to the other solvents and chemicals, and can prevent forgery and counterfeiting of printed and dried security protective documents. The printed ink forms a polymerized or cross-linked solid binder matrix on the surface of the printed or cross-linked documents on the surface of documents by energy irradiation or an oxygen polymerization reaction and the matrix is formed instantaneously or within 24 hours by oxygen polymerization. While, a matrix of conventional exudative printing ink does not actually dry and remains as a liquid between spaces of base material. <P>COPYRIGHT: (C)2008,JPO&INPIT |
