Title:
METHODS FOR SECURING INVISIBLE 2D BARCODES AND PRINTED IMAGES
Document Type and Number:
WIPO Patent Application WO/2016/133716
Kind Code:
A8
Abstract:
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.
Inventors:
LEWIS BRIAN (US)
CAI XIAORONG (US)
RILEY MICHAEL R (US)
CAI XIAORONG (US)
RILEY MICHAEL R (US)
Application Number:
PCT/US2016/016538
Publication Date:
June 29, 2017
Filing Date:
February 04, 2016
Export Citation:
Assignee:
TROY GROUP INC (US)
International Classes:
B42D15/00
Attorney, Agent or Firm:
GESS, Albin H. (US)
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