"Blue light excitable fluorescent green security ink for anticounterfei" by Priya Angadiyavar, Rakshitha K. Jain et al.
 

Blue light excitable fluorescent green security ink for anticounterfeit application

Document Type

Article

Publication Title

Journal of Coatings Technology and Research

Abstract

Fluorescent security printing inks on flexible substrates is an arena that demands consistent developments to prevent the ever increasing menace of document/product counterfeiting. Visible light is a much more accessible and safer excitation source than the commonly used ultraviolet (UV) light. In this context, a simple Schiff base 4-pyridyl-benzylidene 2,4-difluoro aniline (PBDFA) is synthesized as a colorant with significant solid-state fluorescence for preparing security ink formulation. A huge challenge lies in preparing a security ink that does not fluoresce under UV light but produces a green fluorescence when irradiated with a blue light source. Such prints would be hard to forge as compared to the existing UV luminescent security inks. The screen prints obtained on a UV dull paper substrate using the solvent-based PBDFA ink revealed good blue light excitable green fluorescence, photostability, and colorimetric, densitometric, and rub resistance characteristics.

First Page

2195

Last Page

2200

DOI

10.1007/s11998-024-00975-8

Publication Date

11-1-2024

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