FIELD: protective elements.
SUBSTANCE: in accordance to the invention, a valuable object with protective element (2) has first liquid-crystalline material, having thermo-chromic properties, and second liquid-crystalline material, which creates an optically variable effect. The first material is crystalline and on change of temperature and transition to liquid-crystalline state it changes color and polarizes light.
EFFECT: increased degree of protection of valuable object from falsification.
5 cl, 6 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| PROTECTIVE ELEMENT | 2004 |
|
RU2361978C2 |
| IMPORTANT DOCUMENT | 2000 |
|
RU2241603C2 |
| PROTECTIVE ELEMENT | 2007 |
|
RU2419549C2 |
| IMAGE WITH BINARY TILT EFFECT | 2009 |
|
RU2538865C2 |
| FORGERY-PROTECTED DOCUMENT AND PROTECTIVE ELEMENT FOR SAME | 2003 |
|
RU2309853C2 |
| PROTECTION MEMBER AND DOCUMENT PROTECTED AGAINST COUNTERFEIT WITH SUCH PROTECTION MEMBER | 2003 |
|
RU2297919C2 |
| VALUABLE DOCUMENT | 2005 |
|
RU2381906C2 |
| MICROCAPSULE WITH LIQUID CRYSTAL | 2010 |
|
RU2537610C2 |
| PRODUCTION METHOD OF PROTECTIVE ELEMENTS WITH IMAGE-REPRODUCING LAYERS LOCATED WITH ACCURATE REGISTER BETWEEN THEM | 2009 |
|
RU2501662C2 |
| LIQUID CRYSTAL-BASED PIEZOCHROMIC SECURITY ELEMENT | 2010 |
|
RU2536665C2 |
