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Technology Bi-fluorescent inks
 
Protection strategy Product authentication
Type Overt feature
System Security inks
Medium Secondary packaging
Authentication/Identificaton Authentication
Traceability No
Cost Price on request
Required equipment Irradiation with an integrated, dual-wavelength lamp or two separate lamps
Vertification level Pharmacist (with the adequate light excitation sources)
N.B.
Description Fluorescence is the emission of light by matter after irradiation with light of a different wavelength. The fluorescent inks normally used for security purposes glow visibly under ultraviolet light. The effect is immediately reversible, and fluorescence ends when the excitation light is removed. Bi-fluorescent inks is the combination of two pigments that different wavelengths of incident light (the two wavelengths can still be in the same spectral region e.g. UV).
 
Strengths Low cost;
Can deter simple attempts at counterfeiting (such as color photocopying);
More secure than single-wavelength fluorescence;
 
Limitations Not considered high security option;
Easily reproduced;
Require irradiation with two specific wavelength;
 
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