A security article may include a substrate. The security article may include a layer of security ink. The layer of security ink may include a set of color-shifting interference particles. The security article may include a layer of magnetic color-shifting ink. The layer of magnetic color-shifting ink may include a set of magnetically aligned magnetic particles. A color-shifting property of the layer of security ink and a color-shifting property of the layer of magnetic color-shifting ink may have a threshold level of similarity to create a color matching effect.

The present invention relates to an improved method for the partial colouring, in particular for the coloured laser engraving, of plastic parts, in particular thermoplastic plastic parts, more particularly thermoplastic plastic parts, comprising a layer structure, and to the resulting partially coloured, preferably coloured and laser engraved, plastic parts, in particular thermoplastic plastic parts.

Environmental monitors for monitoring a predetermined environmental exposure, for example, an historical heat exposure such as a cumulative ambient heat exposure and/or a peak ambient heat exposure may include an environmental indicator material and a security material. The environmental monitor may be configured to attach to a host product for monitoring the predetermined environmental exposure of the host product, and additionally serve as an anti-counterfeiting indicator.

A method and system for writing a label (defined within a predetermined region of the sample 110), the label displaying a visible layout of light-modified regions in a predetermined spatial arrangement. The method comprises: modifying regions of a material within the label using light, wherein the modifying comprises using light of a first polarisation state to provide photo-induced optically active regions of a first type having a first optical activity state which is characteristic of having been formed by light of the first polarisation state, in order to encode covert information in the label using the locations of the first type of light-modified regions within the spatial arrangement of the label.

A method and system for writing a label (defined within a predetermined region of the sample 110), the label displaying a visible layout of light-modified regions in a predetermined spatial arrangement. The method comprises: modifying regions of a material within the label using light, wherein the modifying comprises using light of a first polarisation state to provide photo-induced optically active regions of a first type having a first optical activity state which is characteristic of having been formed by light of the first polarisation state, in order to encode covert information in the label using the locations of the first type of light-modified regions within the spatial arrangement of the label.

The present disclosure relates to a micro-optic device for producing a magnified image, including: a first unitary structure on one side of a substrate, the first unitary structure including a first group of focusing elements and a first group of imagery elements, wherein one of the first group of focusing elements and the first group of imagery elements is recessed with respect to the other, wherein the device further includes at least a first coating of ink overprinted on the first unitary structure, to at least partially fill the recessed group of elements, and wherein a property of the ink provides a visual contrast in the magnified image.

Systems and methods wherein one or more processing operations on an identification document occur after a radiation curable material is applied to a surface of the identification document but before the radiation curable material is fully cured. The one or more processing operations can occur before any curing of the radiation curable material takes place. Alternatively, the one or more processing operations can occur after the radiation curable material has been partially cured, and before the radiation curable material is fully or completely cured.

Systems and methods wherein one or more processing operations on an identification document occur after a radiation curable material is applied to a surface of the identification document but before the radiation curable material is fully cured. The one or more processing operations can occur before any curing of the radiation curable material takes place. Alternatively, the one or more processing operations can occur after the radiation curable material has been partially cured, and before the radiation curable material is fully or completely cured.

The present invention provides an improved security document having a “see-through” security feature that protects a window of the security document in which personalization information may be displayed, such as an image of the authorized document holder. The “see-through” security feature is provided by front and back side images, such as text (e.g. micro-text or encoded indicia), graphics or other image type, that may be laser marked onto the document substrate from a front side thereof through the window to a back side of the window. At least a part of the front image and at least a part of the back image are in front-to-back registration in window, the registration of the images being subject to verification by suitable inspection of the window. The front and back images may be partial images of a composite image when joined together at a juncture with the front-to- back registration of the partial images located at the juncture so that the images together have an appearance of the composite image in the window. Ahernatively, at least a part of the first and second images may be identical with the front-to-back registration of the images located at least one of the identical parts so that the first and second images have an appearance in the window of a single image at those identical parts of the front-to-back registration.

The present invention provides an improved security document having a “see-through” security feature that protects a window of the security document in which personalization information may be displayed, such as an image of the authorized document holder. The “see-through” security feature is provided by front and back side images, such as text (e.g. micro-text or encoded indicia), graphics or other image type, that may be laser marked onto the document substrate from a front side thereof through the window to a back side of the window. At least a part of the front image and at least a part of the back image are in front-to-back registration in window, the registration of the images being subject to verification by suitable inspection of the window. The front and back images may be partial images of a composite image when joined together at a juncture with the front-to- back registration of the partial images located at the juncture so that the images together have an appearance of the composite image in the window. Ahernatively, at least a part of the first and second images may be identical with the front-to-back registration of the images located at least one of the identical parts so that the first and second images have an appearance in the window of a single image at those identical parts of the front-to-back registration.