Transaction card

摘要

This invention relates to a transparent or translucent transaction card having a base comprising a core of substantially transparent or translucent material with a plurality of coats, including optically recognizable ink comprising one or more infrared blocking dyes and other nanoparticles, such as rare earth nanophosphors and other metal nanoparticles, and/or optically recognizable film comprising nanoparticles, such as rare earth nanophosphors, and other metal oxide and/or non-oxide complexes, and methods for their preparation.

主权项

1. A transaction card comprising:
a card body adapted to substantially transmit radiation in a visible light wavelength region; said card body comprising an optically recognizable material selected from at least one of an infrared ink and/or an infrared film, wherein said at least one infrared ink comprises at least one infrared blocking dye and the same or different nanoparticles, wherein said at least one infrared film comprises the same or different nanoparticles and other metal oxide and/or non-oxide complexes sputtered on a substrate, wherein said at least one infrared ink and said at least one infrared film block transmission of incident infrared radiation, andwherein said same or different nanoparticles comprise a plurality of monodisperse particles having:
a single pure crystalline phase of a rare earth-containing lattice, a uniform three-dimensional size, and a uniform polyhedral morphology.