Processes for producing effect layers
US10610888B2 · kind B2 · utility
1Cited by
12References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2017 |
| Grant date | Apr 7, 2020 |
| Priority date | — |
| Expiry date | Jul 12, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D25/369
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to the field of the protection of security documents such as for example banknotes and identity documents against counterfeit and illegal reproduction. In particular, the present invention provides processes for magnetically transferring one or more indicia into a not yet hardened coating layer made of a coating composition comprising platelet-shaped magnetic or magnetizable pigment particles so as to produce optical effect layers (OELs) as anti-counterfeit means on security documents or security articles or for decorative purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.