发明名称 |
METHOD FOR PROTECTING AGAINST DUPLICATION WITH A COLOR COPIER |
摘要 |
<p>A method for protecting against duplication of a document with a color copier comprises providing a background color on a document having an average reflectance value and printing on the background with a contrast color having a spectral characteristic which modulates the average reflectance value by no more than 5% and has an average value equal to the average reflectance value. The contrast color is printed with a printing medium that allows activation by a rub and reveal action or by application of intense light.</p> |
申请公布号 |
EP0695439(A1) |
申请公布日期 |
1996.02.07 |
申请号 |
EP19940912747 |
申请日期 |
1994.02.24 |
申请人 |
NOCOPI INTERNATIONAL, INC. |
发明人 |
GUNDJIAN, ARSHAVIR |
分类号 |
B42D15/10;B41M3/14;B44F1/12;G03G21/00;G03G21/04;(IPC1-7):G03G21/00 |
主分类号 |
B42D15/10 |
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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