Tamper Evidence Market Responds To Specialist Inks

Siltech, which develops and manufactures inks and labels that respond to different stimuli has said that the tamper evidence market is demonstrating potential for the company's Thermoprint inks.

The Thermoprint inks are claimed to change colour irreversibly when a threshold temperature is exceeded.

Several temperatures of activation are available, each either white-to-black, or white-to-red, or white-to-blue colour change options.

Siltech added that thermoprint inks are water-based, and suitable for flexo, gravure and screen printing.

The company said that its inks react to such stimuli as heat, IR, UV, gamma radiation, steam and ethylene oxide, for instance.

The response is usually by way of a colour change, but the company also offers inks that increase in volume, or swell when heated.

Also on offer are inks and labels that change colour to indicate the completion of a sterilisation process in terms of steam, ethylene oxide, gamma radiation, as well as showing the completion of a thermal or UV radiation cure.

Siltech said that of interest to the food processing - including cooking and sterilising, for example - industry will be Silprocheck.

It is a label and tag, which withstands and monitors the aggressive retorting process by changing colour from red-purple to green.

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