Chromogenic Media Responsive to Environmental Conditions
First Claim
Patent Images
1. A medium capable of developing a latent image comprising:
- a substrate having surface, wherein said surface includes a first chromogenic material providing a first image; and
a second chromogenic material capable of providing a secondary image wherein said secondary image is capable of developing upon exposure to an environmental condition.
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Abstract
The present invention relates to chromogenic material that may respond and shift in color due to environmental conditions such as heat, light or humidity. The light may include both visible and non-visible light, such as ultraviolet light. The chromogenic material may therefore provide a method to independently develop a latent image on a given substrate, and in particular, to a substrate that includes conventional thermosensitive image forming media.
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Citations
21 Claims
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1. A medium capable of developing a latent image comprising:
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a substrate having surface, wherein said surface includes a first chromogenic material providing a first image; and a second chromogenic material capable of providing a secondary image wherein said secondary image is capable of developing upon exposure to an environmental condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A medium capable of developing a latent image comprising:
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a substrate having a surface, wherein said surface includes a first chromogenic material providing a first image and a second material comprising a non-chromogenic material; said non-chromogenic material capable of providing a secondary image on said substrate when said first chromogenic material is exposed to an environmental condition. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. The method of developing a latent image upon exposure to an environmental condition, comprising:
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providing a substrate have a surface, wherein said surface contains a first chromogenic material capable of forming a first image; applying a second chromogenic material wherein said second chromogenic material is capable of forming a secondary image upon exposure to an environmental condition, wherein said environmental condition is capable of rendering said first image as illegible.
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Specification