Security marking method, materials provided with security marks
First Claim
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1. A method of marking fiduciary documents and liquids requiring authentication marks by the use of the fluorescent properties of chelates comprising the steps of:
- (a) introducing only a part of the elements forming at least one chelate into or onto the materials to be marked,(b) incorporating the missing part of the elements forming the chelate in or on the materials to be authenticated to effect the synthesis of the fluorescent chelate, and(c) adding an acid or a base into or onto the marked materials to cause the fluorescence of the identifying chelates to disappear.
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Abstract
The invention relates to fiduciary documents and liquids requiring an authentication and a method of marking.
The authentication is effected by producing a synthesis reaction of a fluorescent chelate in or on the materials to be authenticated.
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Citations
11 Claims
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1. A method of marking fiduciary documents and liquids requiring authentication marks by the use of the fluorescent properties of chelates comprising the steps of:
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(a) introducing only a part of the elements forming at least one chelate into or onto the materials to be marked, (b) incorporating the missing part of the elements forming the chelate in or on the materials to be authenticated to effect the synthesis of the fluorescent chelate, and (c) adding an acid or a base into or onto the marked materials to cause the fluorescence of the identifying chelates to disappear. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification