Security features
First Claim
1. A security substrate for a security substrate document comprising a permeable base substrate security feature having at least one activatable layer and at least one visually apparent liquid impermeable masking layer, said masking layer comprising a security element which has a layer comprising a security element which has a layer of metal supported on a flexible strip, said at least one activatable layer comprising a composition which is generally non-mobile, said composition further including at least one detectable component, in which under dry conditions said at least one masking layer wholly covers the activatable layer and renders it non-detectable, wherein when the activatable layer is wetted with a liquid via the base substrate, the composition becomes mobile and leaches into the substrate surrounding the masking layer to thereby highlight the masking layer.
3 Assignments
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Accused Products
Abstract
The invention relates to improvements in security features in paper and other substrates and in particular to an activatable feature to warn of tampering. The invention further relates to a security feature for a security document comprising at least one activatable layer and at least one visually apparent masking layer, said at least one activatable layer comprising a composition which is generally non-mobile but which becomes mobile when wetted with a liquid, said composition further including at least one detectable component, in which under dry conditions said at least one masking layer wholly covers the activatable layer and renders it non-detectable.
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Citations
53 Claims
- 1. A security substrate for a security substrate document comprising a permeable base substrate security feature having at least one activatable layer and at least one visually apparent liquid impermeable masking layer, said masking layer comprising a security element which has a layer comprising a security element which has a layer of metal supported on a flexible strip, said at least one activatable layer comprising a composition which is generally non-mobile, said composition further including at least one detectable component, in which under dry conditions said at least one masking layer wholly covers the activatable layer and renders it non-detectable, wherein when the activatable layer is wetted with a liquid via the base substrate, the composition becomes mobile and leaches into the substrate surrounding the masking layer to thereby highlight the masking layer.
- 21. A security substrate for security document comprising an impermeable base substrate bearing a security feature having at least one activatable layer and at least one visually apparent liquid permeable masking layer made of paper, said at least one activatable layer comprising a composition which is generally non-mobile, said composition further including at least one detectable component, in which under dry conditions said at least one masking layer wholly covers the activatable layer and renders it non-detectable, wherein when the activatable layer is wetted with a liquid via the masking layer the composition become mobile and leaches through the masking layer to thereby highlight it with respect to the surrounding substrate.
- 38. A security substrate for a security document comprising a permeable base straight and a security feature having at least one activatable layer and at least one visually apparent liquid impermeable masking layer, said masking layer comprising an optically variable layer, said at least one activatable layer comprising a composition which is generally non-mobile, said composition further including at least one detectable component, in which under dry conditions said at least one masking layer wholly covers the activatable layer and renders it non detectable, wherein when the activatable layer is wetted with a liquid via the base substrate, the composition becomes mobile and leaches into the security substrate surrounding the masking layer to thereby highlight the masking layer.
Specification