发明名称 |
REVERSIBLY PHOTOCHROMIC PRINTING INKS |
摘要 |
Photochromic printing inks are disclosed which are in particular used for the printing of security documents. Prints are normally nearly colorless and become colored when energy irradiated, such as by ultraviolet light. This photocoloration is reversible. The printing inks contain photochromic compounds which are protected against other ink components. Methods are described to prepare the inks, to print security documents, and to detect counterfeiting.
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申请公布号 |
CA1340078(C) |
申请公布日期 |
1998.10.13 |
申请号 |
CA19880556404 |
申请日期 |
1988.01.13 |
申请人 |
SICPA HOLDING S.A. |
发明人 |
AMON, ALBERT;BRETLER, HAIM;BLEIKOLM, ANTON |
分类号 |
C09D11/02;B41M3/00;B41M3/14;C09B67/08;C09D11/00;C09K9/02;G03C1/685;(IPC1-7):C09D11/02 |
主分类号 |
C09D11/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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