Security marking method and composition

Details Security marking method and composition Security marking method and composition

B - Operations, Transporting

41

M

B41M 3/14 (2006.01)

Patent

CA 2163083

A security marking method comprises marking a portion of the substrate by applying a first marking fluid which is invisible to an unaided eye when illuminated by both visible light and ultraviolet light and activating the marked portion by applying a second marking fluid thereon. The second marking fluid is reactable with the first marking fluid to be invisible to an unaided human eye when illuminated by visible light and fluorescent when illuminated by ultraviolet light. The invention also includes the composition comprising the first and second marking fluids.

Un procédé de marquage de sécurité consiste à marquer une partie du substrat par application d'un premier fluide de marquage qui est invisible à l'oeil nu, lorsque ce fluide de marquage est éclairé à la fois par une lumière normale et une lumière ultraviolette, et à activer la partie marquée par application d'un second fluide de marquage. Le second fluide de marquage peut réagir avec le premier fluide de marquage qui doit rester invisible à l'oeil nu lorsqu'il est éclairé par une lumière normale, et qui devient fluorescent lorsqu'il est éclairé par une lumière ultraviolette. L'invention se rapporte également à la composition comprenant les premier et second fluides de marquage.

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