A visual security feature is provided that is disposed on a target. The visual security feature includes two substantially transparent layers. At least one of the two substantially transparent layers is present in an image-wise pattern.

Analysis of questionable signatures, with prevention of imitating signatures according to the modern celerity to accept or deny as valid a signature affixed on any kind of document with alphanumeric reference or without alphanumeric reference, by authenticating it with the naked eye and evaluating for such purpose a signature affixed on one or more obstacle(s) of any geometric shape and of any kind of material and any color, which are placed and stuck on the document to be signed or on another external support to the document to be authenticated, and such obstacle(s) impede the normal stroke of the ink instrument with which the signature is written, and the structure resulting from the signature over the obstacles is collated with the structure of the questionable signature and/or with the structure of the signature considered as indubitable.

Analysis of questionable signatures, with prevention of imitating signatures according to the modern celerity to accept or deny as valid a signature affixed on any kind of document with alphanumeric reference or without alphanumeric reference, by authenticating it with the naked eye and evaluating for such purpose a signature affixed on one or more obstacle(s) of any geometric shape and of any kind of material and any color, which are placed and stuck on the document to be signed or on another external support to the document to be authenticated, and such obstacle(s) impede the normal stroke of the ink instrument with which the signature is written, and the structure resulting from the signature over the obstacles is collated with the structure of the questionable signature and/or with the structure of the signature considered as indubitable.

This invention relates to an optical element for the purpose of identification and/or prevention of forgery or copying, including at least one layer with anisotropic optical properties, wherein the anisotropic optical properties are patterned, characterized in that the pattern represents biometric information. In addition, this invention relates to a method for the preparation of an optical element for the purpose of identification and/or prevention of forgery or copying.

This invention relates to an optical element for the purpose of identification and/or prevention of forgery or copying, including at least one layer with anisotropic optical properties, wherein the anisotropic optical properties are patterned, characterized in that the pattern represents biometric information. In addition, this invention relates to a method for the preparation of an optical element for the purpose of identification and/or prevention of forgery or copying.

This invention relates to an optical element for the purpose of identification and/or prevention of forgery or copying, including at least one layer with anisotropic optical properties, wherein the anisotropic optical properties are patterned, characterized in that the pattern represents biometric information. In addition, this invention relates to a method for the preparation of an optical element for the purpose of identification and/or prevention of forgery or copying.

Disclosed is a solvent-borne or UV-curable fugitive ink composition for application to a substrate that is to be provided with indicia. The ink composition comprises at least one halochromic compound and at least one filler compound and is capable of preventing indicia formed with a heat sensitive erasable ink on an area of the substrate carrying the fugitive ink composition and thereafter subjected to a thermal treatment from becoming invisible to an unaided eye.

A visual security feature is provided that is disposed on a target. The visual security feature includes two substantially transparent layers. At least one of the two substantially transparent layers is present in an image-wise pattern.

A visual security feature is provided that is disposed on a target. The visual security feature includes two substantially transparent layers. At least one of the two substantially transparent layers is present in an image-wise pattern.

A visual security feature is provided that is disposed on a target. The visual security feature includes two substantially transparent layers. At least one of the two substantially transparent layers is present in an image-wise pattern.