02-05-2019 дата публикации
Номер: US20190126660A1
A security element comprising a first and a second pattern PAT and PAT formed in or on a substrate, the first pattern PAT being formed by a first material INK1 applied to a first region of the substrate, the second pattern PAT being formed by a second material INK applied to a second region of the substrate, said first and second regions of the substrate overlapping, 112. Security element comprising a first and a second pattern PAT and PAT , which are foimed in or on a substrate ,{'b': 1', '1, 'the first pattern PAT being formed by a first material INK applied to a first region of the substrate,'}{'b': 2', '2, 'the second pattern PAT being formed by a second material INK applied to a second region of the substrate, said first and second regions of the substrate overlapping,'} [{'b': 1', '2', '1', '2', '2', '1', '1', '2, 'a part of the first pattern PAT overlaps with a part of said second pattern PAT, so that there are three areas recognizable: an area wherein PAT, but not PAT is provided, an area wherein PAT, but not PAT is provided, and an area wherein both PAT and PAT are provided,'}, {'b': 1', '1', '1', '1', '1, 'i': a', 'e,, 'the first material INK comprises a first luminescent dye or pigment DYE, which upon excitation by electromagnetic radiation falling within an excitation wavelength range λof the first luminescent dye or pigment DYE is capable of emitting electromagnetic radiation in at least one first emission wavelength range λand'}, {'b': 2', '2', '2', '2', '2, 'i': a', 'e,, 'the second material INK comprises a second luminescent dye or pigment DYE, which upon excitation by electromagnetic radiation falling within an excitation wavelength range λof the second luminescent dye or pigment DYE is capable of emitting electromagnetic radiation in at least one second emission wavelength range λand'}, {'b': 1', '1', '2', '2', '1', '1', '2', '2, 'i': e', 'a', 'a', 'e., 'said first emission wavelength range λof the first luminescent dye or pigment DYE overlaps with ...
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