Security elements and method for their manufacture

    公开(公告)号:AU2013314269A1

    公开(公告)日:2015-04-02

    申请号:AU2013314269

    申请日:2013-09-13

    Applicant: BASF SE

    Abstract: The present invention relates to complex security elements based on recording materials for optical elements with refractive index modulation, in particular, holograms, which are subsequently coated with specific metallic nano-shaped metal particles, a method for their manufacture, in particular on a paper or on a plastic substrate and a security product obtainable using the security element. A further aspect of the invention is the use of such a security element for the prevention of counterfeit or reproduction of a document of value.

    PRINTING DIFFRACTION GRATINGS ON PAPER AND BOARD

    公开(公告)号:CA2838545C

    公开(公告)日:2019-09-24

    申请号:CA2838545

    申请日:2012-06-20

    Applicant: BASF SE

    Abstract: A method is provided for forming a surface relief microstructure on a paper substrate. The method includes the steps of: A) providing a paper substrate; B) applying a curable composition which comprises at least a photoinitiator which absorbs in the UV-A region and in addition in the near VIS range to at least a portion of the frontside of the paper substrate; C) contacting at least a portion of the curable composition with surface relief microstructure; and D) curing the composition by using at least one UV lamp having emission peaks in the UV-A range and near VIS range which is arranged on the backside of the paper substrate.

    Security elements and method for their manufacture

    公开(公告)号:AU2013314269B2

    公开(公告)日:2017-07-06

    申请号:AU2013314269

    申请日:2013-09-13

    Applicant: BASF SE

    Abstract: The present invention relates to complex security elements based on recording materials for optical elements with refractive index modulation, in particular, holograms, which are subsequently coated with specific metallic nano-shaped metal particles, a method for their manufacture, in particular on a paper or on a plastic substrate and a security product obtainable using the security element. A further aspect of the invention is the use of such a security element for the prevention of counterfeit or reproduction of a document of value.

    Printing diffraction gratings on paper and board

    公开(公告)号:AU2012274953B2

    公开(公告)日:2015-07-09

    申请号:AU2012274953

    申请日:2012-06-20

    Applicant: BASF SE

    Abstract: A method and an apparatus for forming a surface relief microstructure, especially an optically variable image on a paper substrate are provided, the method comprising the steps of: A) applying a curable composition to at least a portion of the frontside of the paper substrate; B) contacting at least a portion of the curable composition with surface relief microstructure, especially optically variable image forming means; C) curing the composition by using at least one UV lamp (1, 2, 3) which is arranged on the backside of the paper substrate; D) optionally depositing a layer of a transparent high refractive index material and/or a metallic layer on at least a portion of the cured composition, wherein the lamp (1, 2, 3) having emission peak(s) in the UV-A and near VIS range and the curable composition comprises at least a photoinitiator which absorbs in the UV-A region and preferably in the near VIS range. A paper product obtainable uses the method and an apparatus for forming a surface relief microstructure on a paper substrate. Surface relief microstructures, such as holograms may be replicated rapidly and with accuracy on a paper substrate by using the method and the apparatus.

    REJILLAS DE DIFRACCION DE IMPRESION EN PAPEL Y TABLA.

    公开(公告)号:MX2013014568A

    公开(公告)日:2014-03-21

    申请号:MX2013014568

    申请日:2012-06-20

    Applicant: BASF SE

    Abstract: La presente invención se refiere a un método para formar una microestructura en relieve de superficie, especialmente una imagen ópticamente variable (un dispositivo ópticamente variable) sobre un substrato de papel que comprende los pasos de: A) aplicar una composición curable (barniz) a por lo menos una porción del lado frontal del sustrato de papel; B) poner en contacto por lo menos una porción de la composición curable con microestructura en relieve de superficie, especialmente medios de formación de imagen ópticamente variable; C) curar la composición mediante el uso de por lo menos una lámpara de UV que está dispuesta en el lado posterior del sustrato de papel; D) opcionalmente depositar una capa de un material de alto índice de refracción transparente y/o una capa- metálica en por lo menos una porción de la composición curada, en donde la lámpara que tiene pico(s) de emisión en el intervalo de UV-A y preferiblemente cerca del intervalo de VIS y la composición curable comprende por lo menos un fotoiniciador que se absorbe en la región UV-A y preferiblemente además en el intervalo de VIS cercano, un producto de papel obtenible usando el método y un aparato para formar una microestructura en relieve de superficie sobre un sustrato de papel. Las microestructuras en relieve de superficie, tales como hologramas, se pueden replicar rápidamente y con exactitud en un sustrato de papel usando el método y aparato de la presente invención.

    PRINTING DIFFRACTION GRATINGS ON PAPER AND BOARD

    公开(公告)号:CA2838545A1

    公开(公告)日:2012-12-27

    申请号:CA2838545

    申请日:2012-06-20

    Applicant: BASF SE

    Abstract: A method and an apparatus for forming a surface relief microstructure, especially an optically variable image on a paper substrate are provided, the method comprising the steps of: A) applying a curable composition to at least a portion of the frontside of the paper substrate; B) contacting at least a portion of the curable composition with surface relief microstructure, especially optically variable image forming means; C) curing the composition by using at least one UV lamp (1, 2, 3) which is arranged on the backside of the paper substrate; D) optionally depositing a layer of a transparent high refractive index material and/or a metallic layer on at least a portion of the cured composition, wherein the lamp (1, 2, 3) having emission peak(s) in the UV-A and near VIS range and the curable composition comprises at least a photoinitiator which absorbs in the UV-A region and preferably in the near VIS range. A paper product obtainable uses the method and an apparatus for forming a surface relief microstructure on a paper substrate. Surface relief microstructures, such as holograms may be replicated rapidly and with accuracy on a paper substrate by using the method and the apparatus.

    PRINTING DIFFRACTION GRATINGS ON PAPER AND BOARD

    公开(公告)号:MY171909A

    公开(公告)日:2019-11-06

    申请号:MYPI2013004582

    申请日:2012-06-20

    Applicant: BASF SE

    Abstract: Method and an apparatus for forming a surface relief microstructure, especially an optically variable image on a paper substrate (1 00) are provided, the method comprising the steps of: A) applying a curable composition to at least a portion of the frontside of the paper substrate; B) contacting at least a portion of the curable composition with surface relief microstructure, especially optically variable image forming means; C) curing the composition by using at least one UV lamp (1, 2, 3) which is arranged on the backside of the paper substrate; D) optionally depositing a layer of a transparent high refractive index material and/or a metallic layer on at least a portion of the cured composition, wherein the lamp (1, 2, 3) having emission peak(s) in the UV-A and near VIS range and the curable composition comprises at least a photoinitiator which absorbs in the UV-A region and preferably in the near VIS range. A paper product obtainable uses the method and an apparatus for forming a surface relief microstructure on a paper substrate. Surface relief microstructures, such as holograms may be replicated rapidly and with accuracy on a paper substrate (100) by using the method and the apparatus.

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