Method for protecting against forgery sheet-like printed documents
First Claim
1. A method for protecting printed papers and documents against forgery, comprising a step of applying on a document, during a printing thereof, a protective breakable microcapsule layer, said layer including a plurality of breakable microcapsules containing a chemical product adapted to leave an indelible mark on a surface portion of said document as said document is subjected to a tampering force causing said breakable microcapsules to be broken, said breakable microcapsules having a melting temperature of 85°
- C.-90°
C. and being dispersed in a not fully embedded condition in a waxy material, said waxy material, with said breakable microcapsules dispersed therein, being applied on said surface portion of said document at a temperature less than 100°
C. such that said microcapsules are not damaged thereby, said breakable microcapsules being applied in an amount from 4 g/m2 to 7 g/m2 on said document, said method further comprising a step of applying fluorescent inks on at least a surface of said document, such that an attempt to remove said waxy material by means of solvent will dissolve the printing ink used in said printing.
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Accused Products
Abstract
A method for protecting against forgery a printed document comprises the step of applying on the document, during the printing thereof, a microcapsule layer. This layer comprises microcapsules including a chemical product adapted to release an indelible mark which reveals tampering on surfaces portions of a document subjected to a pressing or rubbing tampering force.
14 Citations
7 Claims
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1. A method for protecting printed papers and documents against forgery, comprising a step of applying on a document, during a printing thereof, a protective breakable microcapsule layer, said layer including a plurality of breakable microcapsules containing a chemical product adapted to leave an indelible mark on a surface portion of said document as said document is subjected to a tampering force causing said breakable microcapsules to be broken, said breakable microcapsules having a melting temperature of 85°
- C.-90°
C. and being dispersed in a not fully embedded condition in a waxy material, said waxy material, with said breakable microcapsules dispersed therein, being applied on said surface portion of said document at a temperature less than 100°
C. such that said microcapsules are not damaged thereby, said breakable microcapsules being applied in an amount from 4 g/m2 to 7 g/m2 on said document, said method further comprising a step of applying fluorescent inks on at least a surface of said document, such that an attempt to remove said waxy material by means of solvent will dissolve the printing ink used in said printing. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- C.-90°
Specification