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US 12,036,805 B2Granted
Laser ablation for latent image indicia
AssigneeVerifyMe, Inc.
InventorKeith Goldstein
Life of this patent
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Abstract
A system and method for creating latent image indicia that includes a variable mark. The latent image indicia is made of pigmented ink that can only be viewed when illuminated with a specific frequency of light. The pigmented ink is printed in a solid patch by a conventional printing process. The variable mark in the pigmented ink is created by laser ablation of the pigment. The laser ablation is done after the ink printing as a separate step.
Claims10
A method for creating a latent security marking on a product comprising the steps of:
- applying a solid ink patch using an IR-fluorescent latent ink having an IR up-converting pigment to a substrate at a first step of production or product packaging, said up-converting pigment capable of emission of light at a visible wavelength in response to excitation by irradiation;
- laser ablation of said solid ink patch as a later step of production or product packaging, said laser ablation forming at least one variable mark having an inverse image;
- verifying said variable mark by irradiation with an IR light capable of fluorescing said IR-fluorescent latent ink;
- wherein said variable mark is formed late in the production or product packaging so as to minimize an amount of time between creation of said variable mark and presentation of the product to a consumer or user;
- whereby said laser ablation does not ablate or otherwise affect the substrate.
2 more elements
Dependencies are inferred from the claim text.