发明名称 |
PIEZOCHROMIC SECURITY ELEMENT |
摘要 |
The invention discloses a reversibly piezochromic security element for the forgery-protection of value documents, the security element being characterized in that it comprises a collection of optically contrasting pigment particles in a film or a coating layer of an elastic polymer. In a particular embodiment, the particles are optically variable pigment flakes, oriented in a position which is substantially different from an alignment in the plane of the film or coating layer. |
申请公布号 |
SG174284(A1) |
申请公布日期 |
2011.10.28 |
申请号 |
SG20110064516 |
申请日期 |
2010.04.07 |
申请人 |
SICPA HOLDING SA;BANK OF CANADA |
发明人 |
KRUEGER, JESSICA;DEGOTT, PIERRE;MACPHERSON, CHARLES;DESPLAND, CLAUDE-ALAIN;SCHMID, MATHIEU |
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