Ink With Cohesive Failure and Identification Document Including Same
First Claim
1. An identification document comprising:
- a core including a front surface and a back surface;
an over-laminate including a front surface and a back surface, the back surface being adjacently positioned with said core front surface; and
two or more inks provided on at least one of the front surface of the core or the back surface of the over-laminate, the two or more inks are characterized by including substantially the same degree of adhesion to both the front surface of the core and to the back surface of the over-laminate, the adhesion of the two or more inks to the front surface of the core and the adhesion of the two or more inks to the back surface of the over-laminate is each relatively stronger than a cohesive strength of the ink, and the two or more inks are provided on the front surface or the back surface in a pattern, the pattern including at least a plurality of intertwined or interlocking circles or mesh structures, wherein a first ink of the two or more inks comprises a first color and a second ink of the two or more inks comprises a second, different color.
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Accused Products
Abstract
The present invention provides identification documents with security features. For example, a document may include two or more inks that are designed to cohesively fail upon a de-lamination attack. A resulting failure pattern is preferably difficult to predict. The two or more inks are applied to an identification document including a core and laminate layer. At least one of the inks is characterized such that an adhesive strength of the ink to the core and an adhesive strength of the ink to the laminate layer is each greater than the cohesive strength of the ink itself. Thus, the ink rips apart in a somewhat random-like manner upon a de-lamination attack. The ink can be arranged in interwoven or interlocking patterns or in other desired patterns and locations.
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Citations
13 Claims
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1. An identification document comprising:
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a core including a front surface and a back surface;
an over-laminate including a front surface and a back surface, the back surface being adjacently positioned with said core front surface; and
two or more inks provided on at least one of the front surface of the core or the back surface of the over-laminate, the two or more inks are characterized by including substantially the same degree of adhesion to both the front surface of the core and to the back surface of the over-laminate, the adhesion of the two or more inks to the front surface of the core and the adhesion of the two or more inks to the back surface of the over-laminate is each relatively stronger than a cohesive strength of the ink, and the two or more inks are provided on the front surface or the back surface in a pattern, the pattern including at least a plurality of intertwined or interlocking circles or mesh structures, wherein a first ink of the two or more inks comprises a first color and a second ink of the two or more inks comprises a second, different color. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of making a tamper-resistant identification document comprising:
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providing a core including a top surface;
providing a top laminate including a top surface and bottom surface; and
providing two or more inks on at least one of the top surface of the core or the bottom surface of the top laminate, the two or more inks being characterized by having a relatively lower cohesion strength as compared to each of an adhesion strength between the two or more inks and over-laminate and to an adhesion strength between the two or more inks and the core, the two or more inks provided on the top surface or the bottom surface of the top laminate in a pattern, the pattern including at least a plurality of intertwined or interlocking circles or mesh structures, and a first ink of the two or more inks comprises a first color and a second ink of the two or more inks comprises a second, different color. - View Dependent Claims (11)
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12. A method of providing an identification document, the document comprising a substrate and a laminate, the method comprising:
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providing the substrate and laminate;
providing an optical variable ink in a first location on the substrate or laminate, wherein the optical variable ink includes a first component that reflects light at a first viewing angle, and a second component that reflects light at a second viewing angle;
wherein the optical variable ink is provided such that when the first component is in an active state the second component is in passive state, the first component and the second component cooperating to convey text in an overlapping manner. - View Dependent Claims (13)
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Specification