Form for concealing variable printed information
First Claim
1. A form for concealing variable printed information and including a thermochromatic scrambling pattern, wherein variable information printed over the thermochromatic scrambling pattern cannot be discriminated from the thermochromatic scrambling pattern until heat is applied and the optical properties of the thermochromatic scrambling pattern are altered.
1 Assignment
0 Petitions
Accused Products
Abstract
Variable confidential information (12) is printed over scrambling pattern (14) which is formed of thermochromatic ink. Information (12) cannot be read due to the presence of the underlying scrambling pattern. The information becomes readable when heat is applied to the thermochromatic ink and the optical properties of the thermochromatic ink are altered. Preferably, the alteration of the optical properties of the thermochromatic ink is irreversible
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Citations
9 Claims
- 1. A form for concealing variable printed information and including a thermochromatic scrambling pattern, wherein variable information printed over the thermochromatic scrambling pattern cannot be discriminated from the thermochromatic scrambling pattern until heat is applied and the optical properties of the thermochromatic scrambling pattern are altered.
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9. A method of concealing printed variable information, the method including printing the variable information over a thermochromatic scrambling pattern, wherein the optical properties of the thermochromatic scrambling pattern can be altered to reveal the printed variable information.
Specification