Security document or device having an intaglio contrast effect
AssigneeSecurency Pty Ltd
InventorsHermina Romanic, Wayne Kevin Jackson
Life of this patent
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Abstract
A security document or device having a substrate (2), a smooth highly reflective layer (1) applied to the substrate (2) and having a reflectivity of at least 60 gloss units, a raised printed image (3) of lines or dots applied to said reflective layer (1) by a printing process and having a height of about 10 to 100 μm, and typically about 30 μm, and a similar spacing being adjacent lines or dots, the hue chroma value of the ink used to print the image being between 30 and about 50 chroma units tending towards a saturation value of 60 chroma units, the lightness of the ink being at least 50 L degrees (lightness units), and typically between 70 and 100 L degrees.
Claims40
A security document including a substrate, a smooth highly reflective layer applied to said substrate and having a specular reflectance percentage of at least 60, and a raised printed image applied to said reflective layer by a printing process, at least part of said raised printed image having a height of at least 10 μm, said printed image being printed using ink of a hue having a chroma value of at least 30 chroma units and/or a lightness of at least 50 lightness units.
A method of producing a security document including the steps of applying a smooth highly reflective layer to a substrate, said reflective layer having a reflectivity of at least 60 gloss units, and printing a raised printed image on the reflective layer, at least part of said raised printed having a height of at least 10 μm and being printed using ink of a hue having a chroma value of at least 30 chroma units and/or lightness of at least 50 L degrees.
A security device including a substrate, a smooth highly reflective layer applied to said substrate and having a reflectivity of at least 60 gloss units, and a raised printed image applied to said reflective layer by a printing process, at least part of said raised printed image having a height of at least 10 μm, said printed image being printed using ink of a hue having a chroma value of at least 30 chroma units and/or a lightness of at least 50 lightness units.
A method of producing a security document or device, including the steps of applying a smooth highly reflective layer to a substrate, said reflective layer having a reflectivity of at least 60 gloss units, and printing a raised printed image on the reflective layer, at least part of said raised printed having a height of at least 10 μm and being printed using ink of a hue having a chroma value of at least 30 chroma units and/or lightness of at least 50 L degrees.
Dependencies are inferred from the claim text.