Tintas de Seguridade

SCHALTBARE KAPSELLUMINESZENZPIGMENTE

Resumen de: 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.

PERSONALIZED SECURITY DOCUMENT AND METHOD OF PERSONALIZING A SECURITY DOCUMENT

Resumen de: 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).

PERSONALIZABLE SECURITY DOCUMENT AND METHOD OF MANUFACTURING THE SAME

Resumen de: 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).

METHOD OF FORMING A SECURITY FEATURE FOR A SECURITY DOCUMENT

Resumen de: 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.

COMPOSIÇÃO DE TINTA OPTICAMENTE VARIÁVEL NA FAIXA DO ULTRAVIOLETA PARA IMPRESSÕES DE SEGURANÇA E/OU DE VALOR, DOCUMENTO DE SEGURANÇA E/OU DE VALOR E PROCESSOS DE PREPARAÇÃO ASSOCIADOS

Nº publicación: PT119510A 09/12/2025

Solicitante:

UNIV NOVA DE LISBOA [PT]
IMPRENSA NAC CASA DA MOEDA SA [PT]
UNIVERSIDADE NOVA DE LISBOA,
IMPRENSA NACIONAL - CASA DA MOEDA, SA

Resumen de: PT119510A

A INVENÇÃO REFERE-SE A UMA COMPOSIÇÃO DE TINTA OPTICAMENTE VARIÁVEL NA FAIXA DO ULTRAVIOLETA PARA IMPRESSÕES DE SEGURANÇA E/OU DE VALOR COMPREENDENDO NANOPARTÍCULAS DIELÉTRICAS, UM DISPERGENTE COMPREENDENDO ETANOL, UM CO-DISPERGENTE COMPREENDENDO ETILENOGLICOL E UM DISPERSANTE DAS NANOPARTÍCULAS DIELÉTRICAS COMPREENDENDO POLIVINILPIRROLIDONA. A INVENÇÃO TAMBÉM INCLUI O PROCESSO DE PREPARAÇÃO DA COMPOSIÇÃO DE TINTA E UM DOCUMENTO DE SEGURANÇA E/OU DE VALOR COMPREENDENDO UMA CAMADA REVESTÍVEL (1), REVESTIDA POR UMA CAMADA (2), FEITA DA COMPOSIÇÃO DE TINTA, E OPCIONALMENTE COBERTA POR UMA SEGUNDA CAMADA FLEXÍVEL (2). A COMPOSIÇÃO DE TINTA É COMPATÍVEL COM VÁRIAS TÉCNICAS DE IMPRESSÃO E APRESENTA UMA AGREGAÇÃO MÍNIMA E UMA RESPOSTA ÓTICA INTENSA NA GAMA DO ULTRAVIOLETA UVA, QUE SÃO ATRIBUTOS RELEVANTES PARA A CONCRETIZAÇÃO DE TINTAS DE SEGURANÇA OCULTAS FIÁVEIS E ÚNICAS. ADICIONALMENTE, O TEMPO DE SECAGEM DA COMPOSIÇÃO DE TINTA É CURTO, OQUE É RELEVANTE PARA PROCESSOS DE IMPRESSÃO MAIS RÁPIDOS, TIPICAMENTE AO NÍVEL INDUSTRIAL.