Process for producing optical effect layers
US11618053B2 · kind B2 · utility
1Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2019 |
| Grant date | Apr 4, 2023 |
| Priority date | — |
| Expiry date | Dec 27, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D3/207
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to the field of protecting value documents and value commercial goods against counterfeit and illegal reproduction. In particular, the present invention provides processes for producing optical effect layers (OELs) comprising non-spherical magnetic or magnetizable particles and comprising a motif made of at least two areas made of a single applied and cured layer, said motif being obtained by using a selective curing performed by irradiation with an actinic radiation LED source (x41) comprising an array of individually addressable actinic radiation emitters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.