# US 7,608,330 B2 · High chroma optically variable color-shifting glitter comprising particles having interference structure coating > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,608,330 B2 - Document ID: US7608330B2 - Status: Granted - Kind: B2 - Application number: 11/363,420 - Filed: 2006-02-27 - Published: 2006-10-12 - Granted: 2009-10-27 - Earliest claimed: 2002-09-13 - Assignees: JDS Uniphase Corporation - Inventors: Alberto Argoitia; Kent E. Coulter; Roger W. Phillips - Web page: https://patentgrep.com/patent/US7608330B2 ## CPC - C09C 1/0015: {Pigments exhibiting interference colours, e.g. transparent platelets of appropriate thinness or flaky substrates, e.g. mica, bearing appropriate thin transparent coatings} - C09D 5/36: Pearl essence, e.g. coatings containing platelet-like pigments for pearl lustre - C09D 11/50: Sympathetic, colour changing or similar inks - C01P 2004/02: obtained by optical microscopy - C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer - C09C 2200/1054: the core consisting of a metal - C09C 2200/1066: comprising at least one metal layer adjacent to the core material, e.g. core-M, M-core-M - C09C 2200/24: Interference pigments comprising a metallic reflector or absorber layer, which is not adjacent to the core - C09C 2200/301: Thickness of the core - C09C 2200/308: Total thickness of the pigment particle - C09C 2220/20: PVD, CVD methods or coating in a gas-phase using a fluidized bed - Y10T 428/2991: Coated - Y10T 428/2998: including synthetic resin or polymer - C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS} - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Opaque glitter particles that are uniform in size and shape are disclosed that have an optically variable color with a change in angle of incident light. The glitter particles have an organic substrate and an optical interference structure on one or both sides of the organic substrate. The optical interference design can be a Fabry-Perot structure or can be an optically variable ink. ## Claims ### Claim 1 Opaque color shifting glitter comprising particles, cut such that their shape and size is substantially uniform, said particles each comprising an inorganic thin film optical interference structure for providing a perceivable color shift with a change in viewing angle or angle of incident light, in the visible spectrum, wherein said inorganic thin film interference structure of each particle is supported by an organic support layer for providing rigidity and for preventing the particles from curling and wherein the inorganic thin film interference structure of each particle is only on one side of the organic support layer. ### Claim 2 (depends on 1) Opaque color shifting as defined in claim 1 wherein each particle has length across its surface of 30 microns or more, and wherein the thickness of the particles are at least 6 microns. ### Claim 3 (depends on 2) Opaque color shifting glitter as defined in claim 2, wherein the thin film interference structure is a Fabry-Perot interference structure. ### Claim 4 (depends on 2) Opaque color shifting glitter as defined in claim 2, wherein the thin film interference structure includes two Fabry-Perot interference structures. ### Claim 5 (depends on 4) Opaque color shifting glitter as defined in claim 4, wherein the two Fabry-Perot structures share a common reflector layer. ### Claim 6 (depends on 4) Opaque color shifting glitter as defined in claim 4, wherein the Fabry-Perot structures each have a dielectric layer and wherein the thicknesses of the dielectric layers are substantially different. ### Claim 7 (depends on 1) Opaque color shifting glitter as defined in claim 1 wherein the inorganic thin film optical interference structure is a layer of optically variable ink. ### Claim 8 (depends on 1) Opaque color shifting glitter as defined in claim 1, wherein the organic support layer has a diffraction grating or a holographic structure formed therein. ### Claim 9 (depends on 8) Opaque color shifting glitter as defined in claim 8, wherein the diffraction grating or the holographic structure is formed on a surface of the organic support layer and wherein the inorganic thin film optical interference structure supported by the organic support layer has the diffraction grating or the holographic structure formed in at least a layer thereof. ### Claim 10 (depends on 9) Opaque color shifting glitter as defined in claim 9, wherein the organic support layer is light transmissive and wherein the inorganic thin film interference structure comprises a color shifting Fabry-Perot structure that can be seen from both sides of a particle. ### Claim 11 (depends on 8) Opaque color shifting glitter as defined in claim 8, wherein the diffraction grating or the holographic structure is formed on a first face of the organic support layer and wherein the inorganic thin film optical interference structure is supported on an opposite face of the organic support layer. ### Claim 12 Opaque color-shifting glitter comprising particles having: an organic support layer and; a) two single or double period Fabry-Perot structures sharing a same reflector layer on only one side of the organic support layer or b) an optically variable color shift ink on only one side of the organic support layer. ### Claim 13 (depends on 12) Opaque color shifting glitter as defined in claim 12, wherein the particles each comprise two symmetrical optically variable structures (SOVSs) each SOVS including an inner reflector layer and an outwardly facing absorber layer, and a dielectric layer disposed there between, said particles each having an diameter “d” of at least 30 microns, and a thickness “t” of more than 6 microns wherein t