Security printing method
First Claim
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1. A method for applying an authentication material to a printed article, the method comprising, after applying ink to the article, dispensing the authentication material in powder form over the article before the ink is fully cured, the authentication material comprising at least one of:
- a fluorescent material;
a magnetic material;
a DNA containing biological material; and
a radio frequency absorbing material.
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Abstract
A method of adding authentication material during printing by dispensing the authentication material in powder form over the articles being printed before the ink used for the printing is fully cured. The method can be combined with the spray powder step during the printing process.
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Citations
40 Claims
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1. A method for applying an authentication material to a printed article, the method comprising, after applying ink to the article, dispensing the authentication material in powder form over the article before the ink is fully cured, the authentication material comprising at least one of:
- a fluorescent material;
a magnetic material;
a DNA containing biological material; and
a radio frequency absorbing material. - View Dependent Claims (2, 3, 4, 5, 6, 26, 27)
- a fluorescent material;
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7. A method for preparing an authenticatable printed article, the method comprising:
- applying ink to the printed article; and
, before the ink applied to the printed article is cured, applying a powder comprising an authentication material atop the ink, the authentication material comprising at least one of;
a fluorescent material;
a magnetic material;
a DNA containing biological material; and
a radio frequency absorbing material. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 29, 30, 31, 32)
- applying ink to the printed article; and
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16. A method for preparing an authenticatable printed article, the method comprising:
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mixing an authentication material with a spray powder for preventing printed articles from adhering to other objects to form a powder mixture;
applying ink to the printed article; and
prior to the ink curing on the printed article, applying the powder mixture to the printed article atop the ink;
wherein the authentication material comprises at least one of;
a fluorescent material;
a magnetic material;
a DNA containing biological material; and
a radio frequency absorbing material. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 33, 34, 35, 36)
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24. A powder mixture for authentication of printed articles, the powder mixture comprising a mixture of an authentication material and a spray powder for preventing printed articles from adhering to other objects wherein the authentication material and the spray powder comprise particles having dimensions in a range of 20-50 μ
- m, wherein the powder mixture is applied over ink that has been printed on the printed articles prior to the ink being cured and wherein the authentication material comprises at least one of;
a fluorescent material;
a magnetic material;
a DNA containing biological material; and
a radio frequency absorbing material. - View Dependent Claims (25, 37, 38, 39, 40)
- m, wherein the powder mixture is applied over ink that has been printed on the printed articles prior to the ink being cured and wherein the authentication material comprises at least one of;
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28. A method according to claim I wherein the authentication material comprises a radio frequency absorbing material detectable via a unique radiation absorption signature.
Specification