Eco-friendly flexographic ink for anti-counterfeiting

A new functional ink could be a promising candidate for anti-counterfeiting applications, including food packaging, documents and labels.

The functional ink formulation can also be utilised in stamp/ink pads. Image source: geralt - Pixabay (symbol image).

The challenge to prevent the counterfeiting of documents is a research area that demands innovative techniques. A new study reports the use of fluorene-based Schiff base (FBH) prepared via a simple, one-step and cost-effective method as a thermally stable and biocompatible pigment for environment-friendly, water-based flexographic ink for potential application in security printing.

Invisible fingerprint

The flexo ink coating and print on the UV dull security paper were invisible in the daylight but displayed bluish-green fluorescence under UV light. The functional ink formulation can also be smartly-utilised in stamp/ink pads to obtain invisible fingerprint for detecting forgery.

The study has been published in Progress in Organic Coatings, Volume 161, December 2021.

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