Recording medium with colored picture information, in particular a check card or identity card
First Claim
1. A method of producing a multilayer recording medium including at least two layers, one which is inaccessible from the exterior of the medium, and combined picture information, comprising the steps of:
- a) dividing said picture information into at least two information parts comprising a color picture and the other of which is a light/dark picture;
b) incorporating the light/dark picture in a sensitized transparent film layer by means of a controlled laser beam to form a gray-tone picture;
c) congruently superimposing the color picture on the light/dark picture information present in the transparent film layer as the gray-tone picture.
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Accused Products
Abstract
A recording medium is provided with picture information in a tamper-resistant and high-resolution form. The picture information is broken down into a light/dark portion and a color portion. The light/dark portion needed for the visual impression is incorporated in the recording medium in a high-resolution form. The colored picture information is congruently superimposed on this portion so as to produce an integral ensemble. Protection from falsification is ensured by incorporating one of the portions of the picture information in the card structure in largely tamper-resistant fashion.
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Citations
11 Claims
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1. A method of producing a multilayer recording medium including at least two layers, one which is inaccessible from the exterior of the medium, and combined picture information, comprising the steps of:
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a) dividing said picture information into at least two information parts comprising a color picture and the other of which is a light/dark picture; b) incorporating the light/dark picture in a sensitized transparent film layer by means of a controlled laser beam to form a gray-tone picture; c) congruently superimposing the color picture on the light/dark picture information present in the transparent film layer as the gray-tone picture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. The method of producing a multilayer recording medium comprising at least two layers including one layer inaccessible from the exterior of the medium and combined picture information, comprising the steps of:
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a) dividing said picture information into at least two information parts comprising a color picture and a light/dark picture; b) applying the light/dark picture to an inner card layer to form a gray-tone picture; c) covering the inner card layer provided with the light/dark picture with a substantially transparent film layer; d) congruently superimposing the colored picture onto the picture information present under the transparent film layer as a gray-tone picture, by incorporating the color picture into the transparent film layer by means of migrating inks. - View Dependent Claims (11)
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Specification