Heat transfer recording media
First Claim
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1. A heat transfer recording medium comprising:
- a substrate having items of information recorded on a surface thereof by heat transfer wherein said substrate includes an its surface a background pattern, an image and literal information, said background pattern and image printed by a heat transfer technique; and
means for providing security against counterfeiting comprising a transparent protective layer provided on at least a portion of the thus recorded surface of said substrate, said protective layer including a design layer therein or thereon which does not substantially conceal said information, said design layer comprising at least one number selected from the group consisting of a transparent pigment, a dye, a fluorescent dye, an infrared absorber, a fluorescent brightener, an ultraviolet absorber, and an oxygen indicator.
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Abstract
The present invention relates to a heat transfer recording medium in which a substrate items of information such as an image and characters formed on a surface thereof by heat transfer and a transparent protective layer is provided on at least a part of the surface of the thus recorded information through an adhesive layer, if required, characterized in that the adhesive layer and/or protective layer function to provide security against counterfeiting. Combining information recorded by heat transfer with a function to provide security against counterfeiting, the present invention provides greater security against falsifying or counterfeiting.
55 Citations
12 Claims
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1. A heat transfer recording medium comprising:
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a substrate having items of information recorded on a surface thereof by heat transfer wherein said substrate includes an its surface a background pattern, an image and literal information, said background pattern and image printed by a heat transfer technique; and means for providing security against counterfeiting comprising a transparent protective layer provided on at least a portion of the thus recorded surface of said substrate, said protective layer including a design layer therein or thereon which does not substantially conceal said information, said design layer comprising at least one number selected from the group consisting of a transparent pigment, a dye, a fluorescent dye, an infrared absorber, a fluorescent brightener, an ultraviolet absorber, and an oxygen indicator. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A heat transfer recording medium comprising:
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a substrate having items of information recorded on a surface thereof by heat transfer; a transparent protective layer provided on at least a portion of the thus recorded surface of said substrate; and an adhesive layer formed between said substrate and said transparent protective layer, wherein said adhesive layer provides means for providing security against counterfeiting, wherein said adhesive layer contains a photosensitive material which does not substantially conceal said information. - View Dependent Claims (8)
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9. A heat transfer recording medium comprising:
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a substrate having items of information recorded on a surface thereof by heat transfer; and means for providing security against counterfeiting comprising a transparent protective layer provided on at least a portion of the thus recorded surface of said substrate, said transparent protective layer containing a photosensitive material which does not substantially conceal said information. - View Dependent Claims (10)
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11. A heat transfer recording medium comprising:
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a substrate having items of information recorded on a surface thereof by heat transfer; and means for providing security against counterfeiting comprising a transparent protective layer provided on at least a portion of the thus recorded surface of said substrate through an adhesive layer, said transparent protective layer comprising an uneven layer. - View Dependent Claims (12)
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Specification