The present invention relates to the field of magnetic assemblies and processes for producing optical effect layers (OELs) comprising magnetically oriented non-spherical magnetic or magnetizable pigment particles on a substrate. In particular, the present invention relates to magnetic assemblies processes for producing said OELs as anti-counterfeit means on security documents or security articles or for decorative purposes.

The present invention relates to the field of magnetic assemblies and processes for producing optical effect layers (OELs) comprising magnetically oriented non-spherical magnetic or magnetizable pigment particles on a substrate. In particular, the present invention relates to magnetic assemblies processes for producing said OELs as anti-counterfeit means on security documents or security articles or for decorative purposes.

An arrangement includes a component and a temperature-dependent, first fluorescent dye, which in a first state has a predetermined first color location and in a second state has a predetermined second color location different from the first color location, and which is disposed on the component or integrated in the component in such a way that the luminescent dye, in dependence on a temperature change acting on it, creates an optically recognizable color change from the first color location to the second color location.

An arrangement includes a component and a temperature-dependent, first fluorescent dye, which in a first state has a predetermined first color location and in a second state has a predetermined second color location different from the first color location, and which is disposed on the component or integrated in the component in such a way that the luminescent dye, in dependence on a temperature change acting on it, creates an optically recognizable color change from the first color location to the second color location.

A laser markable composition includes (a) an aqueous medium; (b) a leuco dye; (c) an optothermal converting agent; and (d) a color developing agent, characterized in that the color developing agent is a polymer particle capable of forming an acid upon exposure to heat.

The present invention relates to a method of manufacturing a substrate with an embedded, UV-visible pattern, wherein a liquid treatment composition comprising at least one acid is deposited onto a substrate, which comprises at least one optical brightener and optionally a filler, wherein the filler comprises 0 to 60 wt.-% of a salifiable alkaline or alkaline earth compound, based on the total weight of the substrate.

The present invention relates to a method of manufacturing a substrate with an embedded, UV-visible pattern, wherein a liquid treatment composition comprising at least one acid is deposited onto a substrate, which comprises at least one optical brightener and optionally a filler, wherein the filler comprises 0 to 60 wt.-% of a salifiable alkaline or alkaline earth compound, based on the total weight of the substrate.

The invention relates to a security pigment of core-shell particles with an organic or metalorganic feature substance, in particular luminescent feature substance, present in dissolved or finely distributed form in the core. The invention further relates to a method for producing the core-shell particles and value documents having the core-shell particles.

The invention relates to a security pigment of core-shell particles with an organic or metalorganic feature substance, in particular luminescent feature substance, present in dissolved or finely distributed form in the core. The invention further relates to a method for producing the core-shell particles and value documents having the core-shell particles.

A plastic card includes a multi-layer card body into which is integrated a window-type security feature. The card body includes a core layer that is laminated between top and bottom opaque print layers. The security feature includes a transparent insert incorporated into the core layer that serves as a light-transmissive card window. Overt and covert print elements are printed onto the top and bottom surfaces, respectively, of top print layer in alignment with the clear insert, with only the overt print element visible in natural light. By contrast, covert print element is only viewable by illuminating the partially light-transmsisive top print layer through the insert. Preferably, the overt and covert print elements are tightly nested design elements that render the resulting harmonized image more difficult to replicate by unscrupulous individuals. Additionally, the insert is preferably dosed with a UV brightener to provide a forensic-level of security to the plastic card.