Method of authenticating polymers, authenticatable polymers, methods of making authenticatable polymers and authenticatable articles, and articles made there from
First Claim
1. A method of authenticating that a test polymer is an authenticatable polymer, wherein the authenticatable polymer has an authentication signal and comprises a substrate polymer and an optically variable tag, the optically variable tag having a fluorescence emission whose wavelength and/or intensity change over time, the method comprisingsubjecting the test polymer to a stimulus sufficient to cause fluorescence of the optically variable tag,determining a test signal from the fluorescence of the test polymer, andauthenticating that the test polymer is an authenticatable polymer if the test signal is the same as the authentication signal of the authenticatable polymer.
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Abstract
Disclosed is a method of authenticating that a test polymer is an authenticatable polymer, wherein the authenticatable polymer has an authentication signal and comprises a substrate polymer and an optically variable tag, the optically variable tag having a fluorescence emission whose wavelength and/or intensity change over time, the method comprising subjecting the test polymer to a stimulus sufficient to cause fluorescence of the optically variable tag, determining a test signal from the fluorescence of the test polymer, and authenticating that the test polymer is an authenticatable polymer if the test signal is the same as the authentication signal of the authenticatable polymer.
78 Citations
21 Claims
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1. A method of authenticating that a test polymer is an authenticatable polymer, wherein the authenticatable polymer has an authentication signal and comprises a substrate polymer and an optically variable tag, the optically variable tag having a fluorescence emission whose wavelength and/or intensity change over time, the method comprising
subjecting the test polymer to a stimulus sufficient to cause fluorescence of the optically variable tag, determining a test signal from the fluorescence of the test polymer, and authenticating that the test polymer is an authenticatable polymer if the test signal is the same as the authentication signal of the authenticatable polymer.
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17. A method of making an authenticatable article comprising:
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incorporating together a substrate polymer and an optically variable tag to make an authenticatable polymer, wherein the optically variable tag has a fluorescence emission having a wavelength and/or intensity that changes over time; and forming an authenticatable article from the authenticatable polymer by melting the authenticatable polymer; and extruding or injection molding the authenticatable polymer; wherein the authenticatable article is an optical disk. - View Dependent Claims (18, 19, 20)
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21. An authenticatable article made by the method comprising:
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incorporating together a substrate polymer and an optically variable tag to make an authenticatable polymer, wherein the optically variable tag has a fluorescence emission having a wavelength and/or intensity that changes over time; and forming an authenticatable article from the authenticatable polymer, wherein the authenticatable article is an optical disk.
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Specification