METHODS FOR SECURING INVISIBLE 2D BARCODES AND PRINTED IMAGES

摘要

A secure document includes a fluorescent barcode and a fluorescent filler printed onto a substrate. The fluorescent barcode is printed using a first fluorescent ink of a first color and the fluorescent filler is printed using a second fluorescent ink of a second color that is different than the first color. In order to read the fluorescent barcode, the secure document must be illuminated with ultraviolet and/or infrared light. Then, a color filter must be used to filter the fluorescent filler out, leaving the fluorescent barcode visible.

主权项

1. A secure document system comprising:
a substrate; a fluorescent barcode having a first color positioned within a specific area of the substrate; a fluorescent filler having a second color, different from the first color, and at least partially positioned within the fluorescent barcode specific area of the substrate; and a filter for filtering out the color of the fluorescent filler in order to read the fluorescent barcode.