Printed matter – Method
Patent
1998-02-02
2000-07-04
Pitts, Andrea L.
Printed matter
Method
283 59, 283 96, 283113, 428211, B42D 1500
Patent
active
060827750
ABSTRACT:
A counterfeit-resistant document comprises a validation mark with a unique chemical signature that identifies the source of the document. The source of the document can be identified by detecting the unique chemical signature on the validation mark of the document, thus verifying the authenticity of the document. The unique chemical signature is applied to the document as ink, so that the validation mark provides information. The validation mark is latent in that the color of the coating matches that of the document, but the directional reflective properties of ink is more uniform than that of the document. In this manner, the letters cannot be readily ascertained by viewing them at an angle perpendicular to the surface of the document, but can be readily ascertained by viewing them at an angle different from that perpendicular to the surface of the document.
REFERENCES:
patent: 5254390 (1993-10-01), Lu
patent: 5344192 (1994-09-01), Phillips
patent: 5688738 (1997-11-01), Lu
patent: 5695220 (1997-12-01), Phillips
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patent: 5772248 (1998-06-01), Phillips
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patent: 5885677 (1999-03-01), Gosselin et al.
Scaman, Steven S., Lex, Elizabeth A., FLEXO, Dec., 1994, pp. 14, 16 & 17.
Carter Monica Smith
Pitts Andrea L.
Verify First Technologies, Inc.
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