Optically variable multilayer thin film interference stack on flexible insoluble web

• Main Authors: MAYER; THOMAS, PHILIPS; ROGER W, ASH; GARY S
• Format: Patent
• Language: English
• Published: 28.01.1992
• Subjects: ADHESIVES; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; BLASTING; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COLOUR PRINTING; CORRECTING FLUIDS; DYES; FILLING PASTES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GLASS; HEATING; INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS; INKS; INORGANIC CHEMISTRY; JOINING GLASS TO GLASS OR OTHER MATERIALS; LIGHTING; LINING MACHINES; MECHANICAL ENGINEERING; METALLURGY; MINERAL OR SLAG WOOL; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PREPARATION OF CARBON BLACK; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; RANGES; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS; SPRAYING OR ATOMISING IN GENERAL; STAMPS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; TYPEWRITERS; USE OF MATERIALS THEREFOR; VENTILATING; WEAPONS; WOODSTAINS

An article adapted to be utilized in the production of optically variable ink comprised of a flexible insoluble web, a release lever formed on the web and an optically variable multilayer thin film interference stack disposed on the release layer and which provides a color shift between two predetermined uniform colors. The interference stack includes an opaque reflective layer which has first and second surfaces and at least one period on each said first and second surfaces to provide the same color shift from each of said first and second surfaces between said two predetermined uniform colors at two different angles of incident light. Each period is comprised of a dielectric layer and a semi-opaque layer.