Optically variable security element, valuable document and manufacturing process
DE102025101526A1Undetermined Publication Date: 2026-07-16GIESECKE & DEVRIENT CURRENCY TECHNOLOGY GMBH
Patent Information
- Application Number
- DE102025101526
- Authority / Receiving Office
- DE · DE
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-07-16
Smart Images
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Abstract
An optically variable security element for securing security papers, valuable documents, and other valuables is disclosed, comprising a substrate body (2) having a front (4) and a back (6), and a printing layer (8) applied to the front (4) of the substrate body (2) and containing first pigments (10) and second pigments (12). The first pigments (10) have cross-linked cholesteric liquid crystals, produce a first color in a first viewing angle range, and are transparent in a second viewing angle range.The second pigments (12) have cross-linked, cholesteric liquid crystals, produce a second, different color in the second viewing angle range and are transparent in the first viewing angle range, so that the first pigments (10) and the second pigments (12) in combination produce a color-shifting effect, and a light-absorbing substrate is provided under the printing layer (8).
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Citation Information
Patent Citations
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