FIELD: protection of securities, certificates, credit, cheque and other information cards against copying and forgery. SUBSTANCE: information card has base 1, microrelief 2 and transparent layer 3,4. Microrelief 2 is made on a light-reflecting layer in the form of a surface of polycrystalline material or surface of polycrystalline film and connected to base 1 by adhesive 5. Transparent layer 3,4 fills in the microrelief and protects it against copying. Card information content is formed by varnish transparent layers 3,4 of different color. At illumination of information card by a light source a specific reflection of areas of microrelief 6 and microrelief 2 differing in brightness is observed. EFFECT: enhanced reliability. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| INFORMATION CARD | 1995 |
|
RU2103179C1 |
| INFORMATION CARD | 1995 |
|
RU2082618C1 |
| INFORMATION CARD | 1995 |
|
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|
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| COMPOSITE MARK | 2009 |
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|
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