Security Inks Containing Infrared Absorbing Metal Compounds
AssigneeInovink Limited
InventorsDavid Malcolm Lewis, Peter Jeffrey Broadbent
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Abstract
A composition comprising an ink and an infrared-absorbing material wherein said infrared-absorbing material comprises a metal, a metal salt, a metal oxide or metal nitride is described. Also described is an article comprising a substrate having imaged thereon an infrared-absorbing material to form a security image; and a method of manufacture of such an article said method comprising image-wise applying substrate a composition comprising an infrared-absorbing material.
Claims20
A composition comprising an ink and an infrared-absorbing material wherein said infrared-absorbing material comprises a metal, a metal salt, a metal oxide or a metal nitride.
An article comprising a substrate having imaged thereon an infrared-absorbing material to form a security image wherein said infrared-absorbing material comprises a metal, a metal salt, a metal oxide or a metal nitride.
A method of manufacture of an article comprising a security image, said method comprising applying image-wise to a substrate a composition comprising an infrared-absorbing material, wherein said infrared-absorbing material comprises a metal, a metal salt, a metal oxide or a metal nitride.
The use of an infrared-absorbing material comprising a metal, a metal salt, a metal oxide or a metal nitride as a security feature on an article.
A method of detecting a genuine article, the article being as defined in 12, said method comprising applying infrared radiation to the article and detecting absorption of said infrared radiation.
A composition, article or method substantially as hereinbefore described with reference to the examples.
Dependencies are inferred from the claim text.