'Invisible' woven patterns could help detect counterfeit clothing

According to Swedish Customs, trade in counterfeit and pirated goods has exploded the past few years in Sweden, the EU and globally. The situation impacts companies, their employees and consumers and it is often difficult to spot the difference between a genuine garment and one that isn’t.

Christian Müller, a researcher in polymer technology at Chalmers University of Technology, has created a partially invisible thread made of polyethylene and a dye molecule that absorbs visible light.

The thread - which is said to be easy and inexpensive for a company to produce - can be weaved into a pattern that is invisible to the naked eye, but which can be seen using a polarisation filter.

‘The production process itself uncomplicated,’ Müller said in a statement. ‘Clothing manufacturers could start using the thread right away to put a signature pattern in their garments. The equipment needed to see the pattern is fairly simple, and is already in place at Swedish Customs, for example.’