A color shifting heat transfer label includes a carrier and a color design layer on the carrier. The color design layer is formulated from an ink having a color shifting effect. The color design layer is configured to separate from the carrier to define a color shifting feature that is adhered to a target object upon application of heat and pressure. The color shifting feature is adhered to the target object to define a plane defined by the color shifting feature such that the color shifting feature exhibits a first color when viewed from an angle of about 90 degrees relative to the plane defined by the color shifting feature and a second color, different from the first color when viewed from an angle of about 45 degrees or less relative to the plane defined by the color shifting feature.

A polychromatic effects heat transfer label includes a carrier and a polychromatic effects design layer on the carrier. The polychromatic effects design layer is formulated from an ink having a polychromatic effects pigment present in a concentration of about 1 percent to about 25 percent by weight of the ink. The polychromatic effects heat transfer label is transferred from the carrier to an apparel item as a polychromatic effects feature and the polychromatic effects feature exhibits robust polychromatic effects on the item. The polychromatic effects feature exhibits no adhesion failure, no color change, no stain, and no visual change after being subjected to a Nike standard embellishment durability wash tests of an accelerated wash, 5 times at a temperature of 60° C. and an innovation standard wash, 15 times at a temperature of 60° C., and being tumbled dry after each wash and exhibits no color transfer, no abrasion and no visual change after being subjected to an AATCC standard crock test, 10 crocks with an SDLATLAS CM-5 AATCC crockmeter and an TIC crockmeter using 2″×2″ squares. Polychromatic effects heat transfer labels for transfer to plastic, carbon fiber and metal are disclosed.

Embodiments of the present invention provide an optical anti-counterfeiting element and a preparation method thereof, and an optical anti-counterfeiting product, and belong to the field of optical anti-counterfeiting. The optical anti-counterfeiting element comprises: a transparent undulating structure layer, comprising a first undulating structure and a second undulating structure, wherein the first undulating structure and the second undulating structure meet the following conditions: the depth-to-width ratio of the first undulating structure is less than that of the second undulating structure, and/or the specific volume of the first undulating structure is less than that of the second undulating structure; and an interference optically variable coating, formed on the first undulating structure, wherein when the interference optically variable coating is observed from two sides, optically variable effects are presented at the two sides, and when the optical anti-counterfeiting element is observed through transmission, an image defined by the boundary of the second undulating structure is presented. Therefore, the optical anti-counterfeiting element can simultaneously present image effects and optically variable effects when being observed from two sides and has a hollowed-out effect when being observed through transmission.

A label sticker includes a release layer strip, an attachment layer strip and a label layer strip. The attachment layer strip is made of an artificial dressing material and its lower surface is coated with or adhered to a first glue layer. The lower surface of the attachment layer strip is attached to the upper surface of the release layer strip through the first glue layer. The label layer strip is made of a waterproof material and its lower surface is coated with or adhered to a second glue layer. The lower surface of the label layer strip is attached to the upper surface of the attachment layer strip through the second glue layer. The label sticker, to be adhered to the human skin to serve identification purposes, can be manufactured by mass production but is unlikely to be wetted and smeared.

Disclosed embodiments may relate to a time-dependent color-changing label for a product. The label may include a first layer comprising a plurality of particles, the particles comprising a time dependent color-changing material that changes color after a predetermined time period, the predetermined time period being greater than one month. The label may also include an attachment structure attaching the first layer to the product. In certain embodiments, the first layer may include a polymer, and the particles may include glass microspheres containing the time-dependent color changing material. The particles may be embedded in the polymer.

A method, comprising: providing a combination of a package and a label attached to the package, wherein the label comprises a fluorescent substance, illuminating the label with excitation light so as to cause the label to emit fluorescence light, capturing an image of the label by using an imaging unit, and detecting the position of the label by analyzing the captured image and/or detecting a degree of adhesion of the label by analyzing the captured image.

A printed article includes: a base layer and a surface layer, at least one anti-counterfeit label disposed between the base layer and the surface layer. The surface layer and the anti-counterfeit label are formed via ink printing. The printed article is equipped with the anti-counterfeiting function, and the anti-counterfeit label provided can be used for authenticity identification. The anti-counterfeit label is concealed inside the printed article such that it cannot be detected easily. When a light is shone onto the printed article, the anti-counterfeit label shows on the printed article.

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 method, comprising: providing a combination of a package and a label attached to the package, wherein the label comprises a fluorescent substance, illuminating the label with excitation light so as to cause the label to emit fluorescence light, capturing an image of the label by using an imaging unit, and detecting the position of the label by analyzing the captured image and/or detecting a degree of adhesion of the label by analyzing the captured image.

Sealing a package with a visually transparent sealing label is described. The visually transparent sealing label contains an ultraviolet blocking component to prevent transmission of ultraviolet radiation through the label to the surface of the package. The package comprises an activatable component that upon excitation with ultraviolet radiation emits luminescence. The presence of the sealing label on the package may be verified by illuminating the sealing label with ultraviolet radiation and by observing whether the level of luminescence from the package material under the sealing label is lower than a limit value.