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Wednesday, 18 September 2019
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Raw materials & technologies, Raw materials, Coatings pigments

Synthesising novel fluorescent offset ink based on coumarin dyes

Wednesday, 4 June 2014

Novel fluorescent inks based on coumarin dyes used in offset printing techniques were developed by Iranian researchers.

Researchers investigated the influence of fluorescences on the physical properties of ink coatings

Source: Philipps-Universität Marburg, FB Chemie

Researchers investigated the influence of fluorescences on the physical properties of ink coatings

Source: Philipps-Universität Marburg, FB Chemie

First, the influences of very long alkyd resin, maleic varnish, and phenolic varnish substrates and dye concentrations on the fluorescence properties of these dyes, and secondly, the effects of the presence of fluorescent dyes on the physical properties of inks were examined.

Dye induces increase in viscosity

Accordingly, two offset inks were prepared: one with an obtained optimum formulation possessing the strongest fluorescence emission in alkyd resin and maleic varnish with a weight ratio of 60:40, and one without fluorescent dyes. Their physical properties, such as rheological behaviour, tack, and ink-in-water emulsification, were studied. Both inks showed Newtonian behaviour, and the dye induced small increases in the viscosity, thixotropy, and tack values of the fluorescent ink.

The study is published in: Progress in Organic Coatings, Volume 77, Issue 9, September 2014, Pages 1351-1359.

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