Abstract:
The invention concerns a polymer-bonded polycyclic aromatic hydrocarbon compound of general formula (1): (P—O) x —Q—(Y) w (1) wherein P represents a polymeric moiety having at least three repeating units which comprise an optionally substituted phenyl ring; Q represents a perylene, quaterrylene or terrylene moiety; Y is selected from (i) halogen and(ii) optionally substituted N-heterocycloaliphatic groups having from 3 to about 8 ring members which are bonded to Q through an N atom, provided that at least one Y represents(ii); x represents an integer of from 1 to 4; w represents an integer of from 1 to 4. The invention further concerns a process for making such a compound, and the use thereof in a printing ink composition, which can be used in particular for making marking or security features.
Abstract:
The present invention is related to an intaglio ink composition comprising a first component A) and a second component B), wherein the first component A) is selected from the group consisting of i) about 0.1% to about 40 % by weight of a plurality of first particles having a modal particle diameter between about 1 nm and about 3 μm, said plurality of first particles may be a material having machine readable properties, preferably selected from the group consisting of magnetic properties, UV- or IR-absorbing properties, optically variable properties, light polarization properties, electro-conductive properties, luminescent properties and combinations thereof, ii) about 1% to about 20% by weight of one or more dyes, said one or more dyes may be a material having machine readable properties preferably selected from the group consisting of IR-absorbing properties, luminescent properties and combinations thereof, and iii) combinations thereof, and the second component B) is about 0.1% to about 40% by weight of a plurality of second particles having a modal particle diameter between about 6 μm and about 25 μm, said plurality of second particles may be a material having machine readable properties preferably selected from the group consisting of magnetic properties, UV- or IR-absorbing properties, optically variable properties, light polarization properties, electro-conductive properties and luminescent properties and combinations thereof, wherein the first component A) and the second component B) exhibit at least one different characteristic, said characteristic being selected from the group consisting of the CIE (1976) color index parameters, machine readable properties, and a combination thereof, the % by weight being based on the total weight of the intaglio ink composition.
Abstract:
A security device (20) is provided, comprising a first transparent layer (21) having an optically variable effect generating relief structure (22) formed in a surface thereof; a reflection enhancing layer (23) extending over the relief structure and following the contour of the relief; and a second transparent layer (24) extending over the reflection enhancing layer, the lateral extent of the second transparent layer being less than the whole area of the security device and corresponding to the lateral extent of the reflection enhancing layer. The first and/or second transparent layer comprises one or more optically effective substances such that the appearance of the optically variable effect generated by the relief structure is different when viewed through the first transparent layer compared with when viewed through the second transparent layer, at least under illumination at a wavelength at which at least one of the optically effective substance(s) is visible.
Abstract:
A method and computing system are proposed for producing an authenticable security device with two sides. The verso side is covered with an ajustable luminescent emissive layer formed by invisible luminescent ink halftones and possibly a UV absorbing printed layer. The recto side is covered with transmissive non-luminescent ink halftones. The backlit colors resulting from the emissions of the luminescent layer or resulting from illumination by normal white light through the transmissive non-luminescent ink halftones are predicted by a backlighting model. This model enables computing the surface coverages of the luminescent and/or non- luminescent ink halftones in order to obtain a desired color either under excitation light (UV light) or under normal white light. This enable creating authenticable backlit images substantially similar to pre-stored reference images, either under normal white light, under excitation light, or under both the normal white light and the excitation light.
Abstract:
A method of producing a security document including the steps of producing a first part of a colour image by colour laser marking a security document precursor; and producing a second part of the colour image by a second imaging technique different from laser marking. The resulting security document is more difficult to falsify.
Abstract:
A new covert security feature for paper/polymeric substrates using a coating/marking ink which have sharp and distinct infra-red absorption is disclosed herein. Further, the invention discloses a method for incorporating the said security markers into the substrate and the use for authentication thereof.
Abstract:
Изобретение относится к носителям информации, защищенным от подделки и способам защиты от подделки полиграфической продукции. Носитель информации имеет прозрачный участок, на обеих сторонах которого расположены графические элементы в виде линейного растра высокого разрешения, образующие периодическую структуру, при этом взаимное расположение названных элементов таково, что они формируют изображение, которое является скрытым при рассматривании в отраженном свете и видимым при рассматривании на просвет, причем при изменении направления рассматривания на просвет изображение изменяется с позитивного на негативное и наоборот, и/или изменяется его цвет полностью или частично, и/или возникает эффект движения одноцветных или многоцветных муаровых полос. Способ изготовления носителя информации включает нанесение на обе стороны прозрачного участка носителя графических элементов полиграфическим способом. При этом после печати носитель информации сохраняет свою плоскостность. Изобретение обеспечивает повышение защищенности изделий, получение нового оптически переменного эффекта и/или эффекта движения, а также повышение технологичности и снижение стоимости защитного элемента.
Abstract:
La presente invención se refiere a un producto de impresión y a su procedimiento de realización, comprendiendo dicho producto de impresión al menos dos imágenes 1 1, 12 diferentes, cada una de las cuales se muestra por separado bajo diferentes condiciones de luz, según incida o no luz visible sobre el producto. La primera imagen está formada por una trama de semitonos opacos separados entre sí mientras que la segunda imagen está formada por una trama de semitonos fotoluminiscentes interpuesta entre la trama de semitonos opacos sin superponerse con esta. Entre dos semitonos opacos adyacentes pertenecientes a una misma fila está dispuesto al menos un semitono fotoluminiscente y entre dos semitonos opacos adyacentes pertenecientes a una misma columna está dispuesto al menos un semitono fotoluminiscente.
Abstract:
A new covert security feature for paper/polymeric substrates using a coating/marking ink which have sharp and distinct infra-red absorption is disclosed herein. Further, the invention discloses a method for incorporating the said security markers into the substrate and the use for authentication thereof.