Copy restrictive color-reversal documents
First Claim
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1. A color-reversal copy restrictive medium comprising:
- a support layer;
at least one image-forming layer supported by said support layer; and
at least one of said at least one image-forming layers capable of forming a pattern of microdots of diminished optical density from a latent image of a pattern of microdots.
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Abstract
A media for restricting the copying of a color-reversal document utilizing one or more microdots that are embedded in the color-reversal document for providing a non-visual, but machine detectable signal. By detecting the presence of one or more microdots in the color-reversal document, a copy machine is controllably prevented from copying the color-reversal document.
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Citations
27 Claims
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1. A color-reversal copy restrictive medium comprising:
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a support layer; at least one image-forming layer supported by said support layer; and at least one of said at least one image-forming layers capable of forming a pattern of microdots of diminished optical density from a latent image of a pattern of microdots. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A color-reversal copy restrictive medium comprising:
- a support layer;
at least one image-forming layer supported by said support layer; and at least one of said at least one image-forming layers capable of forming a pattern of microdots of diminished optical density from a latent image of a pattern of microdots wherein the formed microdots are minls-yellow in hue when viewed against a yellow background and blue in hue when viewed against a neutral background. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
- a support layer;
Specification