Safety device and method for its manufacture as well as safety article and safety document

Abstract

The invention discloses a security device and a manufacturing method thereof, as well as a security article and a security document. The security device comprises: a first ink (21) and a second ink (22), which are respectively arranged on the first and second laterally offset of the security device. In the second region, the first and second inks each include respective luminescent materials, both luminescent materials emitting light in response to radiation at at least one excitation wavelength in the ultraviolet spectrum; a third ink (23), disposed in contact with the device in a third region of the device in which the first and second regions are laterally offset, the third ink does not emit light in response to the at least one excitation wavelength; and a fourth ink (24) arranged in a masking pattern, the fourth ink and the first ink One or more portions of the first ink in the region and / or the second ink in the second region partially overlap, and the fourth ink does not emit light in response to the at least one excitation wavelength.

Description

technical field [0001] The present invention relates to a security device for authenticating valuables including security documents such as banknotes, cheques, passports, identity cards, revenue stamps and other security documents. Methods for producing these security elements are also disclosed. Background technique [0002] Valuables (items of value), and in particular valuable documents such as banknotes, cheques, passports, identification documents, certificates and licenses, generally by counterfeiters and those wishing to make fraudulent copies of them and / or to The target of the person making the change to the data. Usually, such objects are provided with a number of visible security devices for checking the authenticity of the object. By "security device" we mean features that cannot be reproduced exactly by visible light, for example by using standard available copying or scanning equipment. Examples include features based on one or more patterns, such as microte...

AI Technical Summary

Problems solved by technology

However, in some cases the non-UV colors of the two inks may not match exactly and / or the two inks may have different gloss levels

This could result in the presence of two different inks being detectable to the naked eye using only visible light

While the visual difference may be subtle, this can reveal the presence of hidden features and thus significantly reduce their level of security

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