Optically variable marking
First Claim
1. An optically variable marked substrate comprising a semiopaque substrate with a first surface that is covered with an optically variable layer and a second surface that is partially covered with a metal or metallised layer in the shape of a pattern, wherein the optically variable layer comprises one or more optically variable pigments dispersed in a transparent binder.
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Accused Products
Abstract
The invention relates to an optically variable marking comprising a semiopaque substrate with a first surface that is covered with an optically variable layer that is for example a liquid crystal polymer layer or a layer comprising pearlescent pigments, and a second surface that is partially covered with a metal layer in the shape of a pattern, to methods of its preparation and to its use for decorative or security applications.
25 Citations
27 Claims
- 1. An optically variable marked substrate comprising a semiopaque substrate with a first surface that is covered with an optically variable layer and a second surface that is partially covered with a metal or metallised layer in the shape of a pattern, wherein the optically variable layer comprises one or more optically variable pigments dispersed in a transparent binder.
- 12. An optically variable marked substrate comprising a semiopaque substrate with a first surface that is covered with an optically variable layer and a second surface that is partially covered with a metal or metallised layer in the shape of a pattern, wherein the semiopaque substrate is a plastic film comprising light absorbing particles.
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17. An optically variable marked substrate comprising a semiopaque substrate with a first surface that is covered with an optically variable layer and a second surface that is partially covered with a metal or metallised layer in the shape of a pattern, wherein the semiopaque substrate is a circular polariser film.
- 18. An optically variable marked substrate comprising a semiopaque substrate with a first surface that is covered with an optically variable layer and a second surface that is partially covered with a metal or metallised layer in the shape of a pattern, wherein the optically variable layer comprises a polymerised cholesteric liquid crystal material with planar orientation.
Specification