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PIGMENT PREPARATIONS FOR USE IN LOW VISCOSITY SECURITY INKS

Absstract of: WO2025257227A1

The present invention relates to the use of a pigment preparation for security applications, or in low viscosity security inks, said pigment preparation comprises (A) at least one organic pigment, (B) at least one pigment derivative, selected from the group of the sulfonic acid derivatives of quinophtalone pigments; wherein the organic pigment (A) particles have a mean crystallite size in the range of from 15 nm to 28 nm, especially in the range of from 20 nm to 28 nm, wherein the low viscosity security inks are selected from the group of screen printing inks, flexography printing inks, heliogravure printing inks, staining inks, inkjet printing inks, spray coating inks, aerosol jet printing inks, electrohydrodynamic printing inks, slot die coating inks, and Laser Induced Forward Transfer (LIFT) printing inks. The low viscosity security inks, comprising the pigment preparation, having altogether advantageous performance properties, especially high color strength and excellent absorption characteristics paired with good dispersion stability and low sedimentation. A high penetration depth is achieved when used in dyeing paper, cellulose etc.

SECURITY ELEMENT

Absstract of: MX2025009293A

There is provided a security element, comprising: an optic layer; a metallic layer; and a printed magnetic ink layer. The security element optionally comprises a photoluminescent layer. Also provided is a security document comprising the security element and a substrate, wherein the security element is surface applied, or partially or wholly embedded in the substrate. The security element may provide enhanced anti-counterfeiting protection to security documents such as banknotes.

POLYMER PARTICLES FOR MARKING OR CODING OBJECTS

Absstract of: WO2024165815A1

The invention relates to providing markers for identifying and/or authenticating objects, in particular valuable objects, and, more specifically, stable, effective, easily synthesised, economical, unforgeable markers that afford multiple, complex coding possibilities. The invention relates to particles (P), in particular particles suitable for marking, identifying and/or authenticating objects, in particular valuable objects, that are: - based on at least one polymer bearing chelating groups; - the largest dimension of which is between 0.1 and 1000 µm, preferably between 1 and 500 µm, even more preferably between 1 and 50 µm; and - to which are bonded at least one mineral marking element (M) and, optionally, at least one organic marking element (O); at least one portion of these one or more mineral marking elements (M) being chelated by the polymer. The invention also relates to a powder, a suspension or a composition comprising these particles P, and to a method for producing these particles.

PERSONALIZED SECURITY DOCUMENT, METHOD OF PERSONALIZING A SECURITY DOCUMENT AND A PERSONALIZABLE SECURITS DOCUMENT

Absstract of: WO2025252912A1

A personalized security document (10) includes a first personalized image (4, 4a) laser engraved in at least one layer of laser-engravable material (2, 12) from a first side (S1) of the security document (10), and a second personalized image (5, 5a) laser engraved in the at least one layer of laser-engravable material (2, 12) from a second side (S2) of the security document (10). Both the first personalized image and the second personalized image exhibit a color-change effect when viewed in reflection. In some cases, the two personalized images are engraved in two different layers of laser-engravable material (2, 12).

METHOD OF FORMING A SECURITY FEATURE FOR A SECURITY DOCUMENT

Absstract of: WO2025252916A1

A plurality of optically variable inks (2, 3, 5, 8) are used to print a multiplexed image (18) that can be observed in at least a first observation mode and a second observation mode on a substrate (1) of a security document (10). The optically variable inks (2, 3, 5, 8) are selected such that, in the first observation mode, first and second optically variable inks have a first color and third and fourth optically variable inks have a second color and, in the second observation mode, the first ink and the third ink have a third color and the second ink and the fourth ink have a fourth color. This allows for displaying different bicolor images in the first and second observation modes, where the appropriately configured inks can be selected from a set of available optically variable inks, or obtained by mixing such inks with one or more additional inks.

METHOD FOR ADDITIVELY PRINTING ON A MEDIUM USING FLUORESCENT INVISIBLE INKS

Absstract of: WO2025252526A1

The invention relates to a method for printing an image on a security document, said method using invisible inks that are fluorescent and visible under ultraviolet radiation, characterised in that it comprises a step of additive colour synthesis, consisting in: - decomposing a visible digital image into three (red, green and blue (R, G, B)) digital image masks (13) such that the superposition of the three masks (13) corresponds to the base image; - applying to each R, G, B digital colour mask (13) computer processing (14) consisting in introducing security patterns into each of the R, G, B digital masks; - printing on a (paper, polycarbonate) physical medium, on top of one another, these three red, green and blue masks provided with their security patterns, using invisible luminescent inks so as to form, on the medium, an invisible image () containing the security patterns () previously introduced into the three RGB digital masks.

SCHALTBARE KAPSELLUMINESZENZPIGMENTE

Absstract of: DE102024114179A1

Die vorliegende Erfindung betrifft ein Kapsel-Lumineszenzpigment umfassend einen Lumineszenzstoff und ein Diarylethen als molekularen Schalter, wobei der Lumineszenzstoff und das Diarylethen als getrennte Moleküle in einem Polymerteilchen gelöst und/oder dispergiert sind, der Lumineszenzstoff ein Emissionsspektrum hat, das Diarylethen in einem ersten Schaltzustand ein erstes Absorptionsspektrum hat und in einem zweiten Schaltzustand ein zweites Absorptionsspektrum hat, das erste Absorptionsspektrum des Diarylethens nicht signifikant mit dem Emissionsspektrum des Lumineszenzstoffs überlappt und das zweite Absorptionsspektrum des Diarylethens signifikant mit dem Emissionsspektrum des Lumineszenzstoffs überlappt, so dass im ersten Schaltzustand deutlich intensivere Lumineszenz des Lumineszenzstoffs auftritt als im zweiten Schaltzustand des Diarylethens. Die vorliegende Erfindung betrifft weiterhin eine schaltbare Lumineszenzdruckfarbe, umfassend ein Kapsel-Lumineszenzpigment wie hierin beschrieben sowie ein Wertdokument, bevorzugt eine Banknote, umfassend einen Aufdruck mit einer ersten, schaltbaren Lumineszenzdruckfarbe wie hierin beschrieben.

System and Method for Production and use of a Photonic Crystal Printing Ink Solution

Absstract of: US2025376598A1

Systems and methods used for or in connection to production and printing of a photonic crystal forming ink solution, which involve use of a block polymer mixture and optionally a solvent, wherein the color of the printed ink solution may be set either through a single or multiple block polymer mixtures (i.e. premixed coloring) or through printing multiple layers of distinct single or multiple block polymer mixtures (i.e. post print coloring). The composition(s) used by the systems and methods function as a structural color (i.e., a photonic crystal) precursor, wherein forming, loading, printing, and optional post-print processing of the ink solution on a substrate, function to provide a desired photonic crystal print object possessing reflective coloration properties.

FIBERS FOR VERIFYING FABRIC AUTHENTICITY AND SYSTEM FOR VERIFYING FABRIC AUTHENTICITY BY USING SAME

Absstract of: US2025377297A1

The present invention relates to fibers for verifying fabric authenticity, which exhibit the functionality of verifying fabric authenticity by mixing a special pigment with fibers, and a system for verifying fabric authenticity by using the fibers. The fibers for verifying fabric authenticity of the present invention, which comprise an infrared light-emitting body, are included inside yarn or fabric to provide an effect of verifying authenticity or preventing forgery. For example, analysis for authenticity identification is complicated and impossible for certain functional products after fabric manufacture, but the fabric authenticity verification fibers of the present invention enable rapid and accurate authenticity identification.

A SECURED MULTI-LAYERED AUTHENTICATION LABEL

Absstract of: WO2025253361A1

The present invention relates to a secured multi-layered authentication label (100), wherein a semi-concealing layer (Ls) disposed over a metallized tamper evident holographic layer (L1) intended to be removed, thereby facilitating a first level and a second level of authentication, a printed layer (L2) positioned beneath the metallized tamper evident holographic layer (L1) and having a first surface (L2a) and a second surface (L2b) and each surface is embedded with a set of information via a plurality of inks, thereby enabling a third level and a fourth level of authentication, a substrate layer (L3) positioned under the second surface of the printed layer (L2) and having a primary surface (L3a) and a secondary surface (L3b) coated with a holographic transfer film and upon tampering, a holographic coating on holographic transfer film is transferred on a target product, thereby providing a fifth level of authentication.

PERSONALIZABLE SECURITY DOCUMENT AND METHOD OF MANUFACTURING THE SAME

Absstract of: EP4659966A1

A personalizable security document (10) includes a layer of laser-engravable material (4) embedded in a substrate (1) of the security document (10). The layer of laser-engravable material (4) can be irradiated with laser light of a single wavelength to form a color portrait (5) of a holder of the security document (10), due to the layer of laser-engravable material (4) including thermochromic pigments that change their color in an irreversible manner upon irradiation with laser light. A reproducible result can be obtained by carefully controlling the height of the laser-engravable material layer inside the substrate (1), in particular, during manufacturing of the personalizable security document (10).

PERSONALIZED SECURITY DOCUMENT AND METHOD OF PERSONALIZING A SECURITY DOCUMENT

Absstract of: EP4659964A1

A personalized security document (10) includes a first personalized image (4, 4a) laser engraved in at least one layer of laser-engravable material (2, 12) from a first side (S1) of the security document (10), and a second personalized image (5, 5a) laser engraved in the at least one layer of laser-engravable material (2, 12) from a second side (S2) of the security document (10). Both the first personalized image and the second personalized image exhibit a color-change effect when viewed in reflection. In some cases, the two personalized images are engraved in two different layers of laser-engravable material (2, 12).

METHOD OF FORMING A SECURITY FEATURE FOR A SECURITY DOCUMENT

Absstract of: EP4659965A1

A plurality of optically variable inks (2, 3, 5, 8) are used to print a multiplexed image (18) that can be observed in at least a first observation mode and a second observation mode on a substrate (1) of a security document (10). The optically variable inks (2, 3, 5, 8) are selected such that, in the first observation mode, first and second optically variable inks have a first color and third and fourth optically variable inks have a second color and, in the second observation mode, the first ink and the third ink have a third color and the second ink and the fourth ink have a fourth color. This allows for displaying different bicolor images in the first and second observation modes, where the appropriately configured inks can be selected from a set of available optically variable inks, or obtained by mixing such inks with one or more additional inks.

Procédé d’impression additif d’un support utilisant des encres invisibles fluorescentes

Absstract of: FR3162673A1

L’invention concerne un procédé d’impression d’une image sur un document de sécurité, ledit procédé utilisant des encres invisibles qui sont fluorescentes et visibles sous un rayonnement ultraviolet, caractérisé en ce qu’il comporte une étape de synthèse additive de couleurs, consistant à : Décomposer une image numérique visible en trois masques d’images numériques Rouge, Vert et Bleu (R, V, B) de façon que la superposition des trois masques corresponde à l’image de base ;appliquer à chaque masque de couleur numérique R, V, B un traitement informatique consistant à introduire des motifs de sécurité dans chacun des masques numériques R,V,B ;imprimer sur un support physique (papier, polycarbonate) ces trois masques Rouge, Vert et Bleu les uns sur les autres, en utilisant des encres invisibles luminescentes de façon à former sur le support une image invisible contenant les motifs de sécurité préalablement introduits dans les trois masques numériques RVB. Figure pour l’Abrégé : figure 2

RECORDING BODY AND ARTICLE

Absstract of: US2025367958A1

A recording body that makes it difficult to take out a recording member therefrom. The recording body includes an exterior material covering at least a part of a surface of a laminate. The laminate includes a base material, an intermediate layer having a housing portion, a recording member provided in the housing portion, and an overlay layer. The housing portion is in a part of a plane of the intermediate layer. The housing portion is a through hole penetrating the intermediate layer in a thickness direction thereof or a recess recessed in the thickness direction of the intermediate layer. The recording member includes a color development layer containing a coloring compound having an electron donating property, a developer having an electron accepting property, and a matrix resin. The base material, the intermediate layer, and the overlay layer contain the same type of resin material and are bonded by fusion.

DATA CARRIER WITH MACHINE-READABLE SECURITY FEATURE, PRODUCTION METHOD AND AUTHENTICITY CHECK METHOD

Absstract of: MX2025004941A

The invention relates to a data carrier (10), in particular a value or security document, having a substrate (20) which comprises at least one transparent plastics layer and two opposing main surfaces. The data carrier additionally contains two opaque-white layers (22, 32) having a white, opaque appearance, which are applied to the opposing main surfaces of the substrate (20). Each of the opaque-white layers (22, 32) consists of a layer sequence of two or more partial layers (24a-c, 34a-c) extending from a lowermost white layer (24a, 34a) to an uppermost white layer (24c, 34c). The data carrier also contains a machine-readable security feature which comprises a machine-readable feature substance (38) which is present in at least one of the partial layers (24c) of at least one of the opaque-white layers (22, 32).

DATA CARRIER HAVING A MACHINE-READABLE SECURITY FEATURE, PRODUCTION METHOD, AND SECURITY SUBSTRATE SHEET

Absstract of: CN120225366A

The invention relates to a data carrier (10), in particular a value document or security document, comprising a substrate (12) having a plastic layer, and further comprising machine-readable security features (52, 54). According to the invention, the machine-readable security feature (52, 54) comprises a machine-readable feature material which is present in an embedded layer applied to the substrate, i.e. A white cover layer (30, 34), a functional layer (32, 36), a print receiving layer and/or a paint layer (40).

ENERGY CONVERTING PARTICLES AND METHODS FOR THEIR USE IN SECURITY, ANTICOUNTERFEITING, AND ANTI-TAMPERING END-USES

Absstract of: WO2024158807A2

A method for security marking of an article is provided. The method includes the step of providing a marking composition. The marking composition includes one or more energy converters which emit UV and/or visible light upon interaction with an applied external energy, and, optionally, a carrier. The marking composition is applied onto at least a part of a surface of the article.

INCLUSIONS FOR USE IN SECURITY PAPERS, METHOD OF MANUFACTURING THEM AND AUTHENTICATIG METHOD

Absstract of: EP4656404A1

An inclusion (2) for incorporation into a security paper substrate (92) is disclosed. The inclusion (2) comprises a substrate (4); a first luminescent region (6) on a first and/or second side of the substrate (4), the first luminescent region (6) emitting visible light of (i) a first colour when viewed under ultraviolet light of a first wavelength and (ii) a second, different, colour when viewed under ultraviolet light of a second, different, wavelength. The substrate (4) also comprises a second luminescent region (8) on the first and/or second side of the substrate, the second luminescent region (8) emitting visible light of a different colour to the first luminescent region (6) when viewed under ultraviolet light of the first wavelength and/or emitting visible light of a different colour to the first luminescent region (6) when viewed under ultraviolet light of the second wavelength. A security paper (90) and a security document comprising such an inclusion (2), and a method (150) of manufacturing such an inclusion (2) are also disclosed.

Taktile Strukturen auf Wertgegenständen

Absstract of: DE102024114397A1

Die Erfindung betrifft ein Sicherheitselement für einen Wertgegenstand aus einem Substrat, insbesondere eine Banknote, ein Label für die Produktsicherung oder eine Umverpackung, wobei das Sicherheitselement aus einem Substrat besteht, auf das eine taktil erfassbare Struktur gedruckt ist. Erfindungsgemäß besteht die taktil erfassbare Struktur aus einem ersten optisch erkennbaren Druckelement in Form einer Farbschicht, die mindestens teilweise auf das Substrat des Sicherheitselements aufgedruckt ist, und einem zweiten taktil erfassbaren Druckelement in Form einer Farbschicht, wobei das zweite Druckelement auf dem ersten Druckelement angeordnet ist und das erste Druckelement nur teilweise bedeckt. Das erste Druckelement bildet hierbei eine optisch erkennbare Grundfläche, auf der das zweite Druckelement angeordnet ist, wobei sich insgesamt eine Druckelement ergibt, das aus einer Grundfläche besteht, die durch das erste Druckelementgebildet wird, wobei die Grundfläche das zweite Druckelement trägt, das wiederum auf der Grundfläche angeordnet ist, so dass ein Betrachter optisch nahezu ausschließlich das erste Druckelement erkennt und taktil nahezu ausschließlich das zweite Druckelement erfasst. Die Erfindung betrifft weiterhin ein Druckwerkzeug zur Herstellung eines derartigen Sicherheitselements.

SWITCHABLE ENCAPSULATED LUMINESCENT PIGMENTS

Absstract of: WO2025242650A1

The invention relates to an encapsulated luminescent pigment comprising a luminescent substance and a diarylethene as a molecular switch, wherein the luminescent substance and the diarylethene are dissolved and/or dispersed as separate molecules in a polymer particle. The luminescent substance has an emission spectrum, and the diarylethene has a first absorption spectrum in a first switched state and a second absorption spectrum in a second switched state, the first absorption spectrum of the diarylethene not significantly overlapping with the emission spectrum of the luminescent substance and the second absorption spectrum of the diarylethene significantly overlapping with the emission spectrum of the luminescent substance such that the luminescence of the luminescent substance is substantially more intense in the first switched state than in the second switched state of the diarylethene. The invention further relates to a switchable luminescent printing ink, comprising an encapsulated luminescent pigment as described herein, and to a value document, preferably a banknote, comprising an imprint which has a first switchable luminescent printing ink as described herein.

SYSTEM OF SWITCHABLE CAPSULE-LUMINESCENT PIGMENTS

Absstract of: WO2025242649A1

The present invention relates to a system of at least two types of switchable capsule-luminescent pigments, wherein the capsule-luminescent pigments are polymer particles having a diameter of 0.1-1000 µm, each containing at least one luminescent substance and a photochemically switchable absorber, wherein a first type of capsule-luminescent pigment comprises a first luminescent substance emitting a first color in the VIS spectral range; a second type of capsule-luminescent pigment comprises the first luminescent substance and a second luminescent substance emitting a second color in the VIS spectral range, the first and the second colors being different from one another; and the two capsule-luminescent pigments each comprise the same photochemically switchable absorber, said photochemically switchable absorber having a first and a second switching state, wherein the absorption spectrum of said photochemically switchable absorber in the second switching state significantly overlaps the emission spectrum of the first luminescent substance. The present invention also relates to a switchable luminescent printing ink, comprising a system of at least two types of switchable capsule-luminescent pigments as described herein, and to a value document, preferably a banknote, having a switchable luminescent print that comprises a system of at least two types of switchable capsule-luminescent pigments as described herein.

SYSTEM CONSISTING OF SWITCHABLE ENCAPSULATED LUMINESCENT PIGMENTS

Absstract of: WO2025242671A1

The invention relates to a system consisting of at least two types of switchable encapsulated luminescent pigments, wherein the encapsulated luminescent pigments are polymer particles with a diameter of 0.1-1000 µm, each particle containing at least one luminescent substance and a photochemically switchable absorber; a first type of encapsulated luminescent pigment comprises a first luminescent substance which emits a first color in the VIS spectral range; a second type of encapsulated luminescent pigment comprises a second luminescent substance which emits a second color in the VIS spectral range, said first and second colors being different; and the two encapsulated luminescent pigments each comprise the same photochemically switchable absorber, said photochemically switchable absorber having a first and a second switched state, and the absorption spectrum of the photochemically switchable absorber greatly overlapping with the excitation spectra of the first and the second luminescent substance in the second switched state. The invention further relates to a switchable luminescent printing ink, comprising a system consisting of at least two types of switchable encapsulated luminescent pigments as described herein, and to a value document, preferably a banknote, having a switchable luminescent imprint, comprising a system consisting of at least two types of switchable encapsulated luminescent pigments as described herein.

SWITCHABLE CAPSULE-LUMINESCENT PIGMENTS

Absstract of: WO2025242669A1

The present invention relates to a capsule-luminescent pigment comprising a luminescent substance and a photochemically switchable absorber as a molecular switch, wherein the luminescent substance and the photochemically switchable absorber are dissolved and/or dispersed as separate molecules in a polymer particle, the luminescent substance having an excitation spectrum, and the photochemically switchable absorber having a first absorption spectrum in a first switching state and a second absorption spectrum in a second switching state, wherein the first absorption spectrum of the photochemically switchable absorber does not significantly overlap with the excitation spectrum of the luminescent substance and the second absorption spectrum of the photochemically switchable absorber does significantly overlap with the excitation spectrum of the luminescent substance, so that the luminescence of the luminescent substance is considerably more intense in the first switching state of the photochemically switchable absorber than in the second switching state of the photochemically switchable absorber. The present invention also relates to a switchable luminescent printing ink, comprising a capsule-luminescent pigment as described herein, and to a value document, preferably a banknote, comprising a print having a first switchable luminescent printing ink as described herein.

SWITCHABLE CAPSULE-LUMINESCENT PIGMENTS

Nº publicación: WO2025242668A1 27/11/2025

Applicant:

GIESECKE DEVRIENT CURRENCY TECH GMBH [DE]
GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH

Absstract of: WO2025242668A1

The present invention relates to a capsule-luminescent pigment comprising a luminescent substance and a photochemically switchable absorber as a molecular switch, wherein the luminescent substance and the photochemically switchable absorber are dissolved and/or dispersed as separate molecules in a polymer particle, the luminescent substance having an energy transfer level relevant to the luminescence, and the photochemically switchable absorber having a first absorption spectrum in a first switching state and a second absorption spectrum in a second switching state, wherein the energy transfer level relevant to the luminescence of the luminescent substance significantly falls into an absorption band of the photochemically switchable absorber in the second switching state, so that the luminescence of the luminescent substance is considerably more intense in the first switching state of the photochemically switchable absorber than in the second switching state of the photochemically switchable absorber. The present invention also relates to a switchable luminescent printing ink, comprising a capsule-luminescent pigment as described herein, and to a value document, preferably a banknote, comprising a print having a first switchable luminescent printing ink as described herein.