Invention Grant
- Patent Title: Optical effect pigment
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Application No.: US16627719Application Date: 2018-06-21
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Publication No.: US11787948B2Publication Date: 2023-10-17
- Inventor: Andrés Ruiz Quevedo
- Applicant: SICPA HOLDING SA
- Applicant Address: CH Prilly
- Assignee: SICPA HOLDING SA
- Current Assignee: SICPA HOLDING SA
- Current Assignee Address: CH Prilly
- Agency: Allen, Dyer, Doppelt & Gilchrist, P.A.
- Priority: EP 382410 2017.06.28
- International Application: PCT/ES2018/070437 2018.06.21
- International Announcement: WO2019/002645A 2019.01.03
- Date entered country: 2019-12-30
- Main IPC: C09C1/00
- IPC: C09C1/00 ; C09D11/322

Abstract:
Optical effect pigment comprising a plurality of layers and a magnetic element, the layers can be arranged in two stacks of asymmetric layers or in a single stack of layers and comprise at least an absorber layer and at least a dielectric layer and can further comprise a reflector layer. The magnetic element presents a magnetisation which is out-of-plane, i.e. predominantly perpendicular to the plane of the pigment, which allows a deposition on the printing substrate whereby the face of the pigment lying up or down on the substrate can be predetermined. Such effect pigment has applications in many fields and specifically in security printing, where due to controlled deposition for instance a double-stack pigment will produce a different optical effect on each of its faces.
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