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New technique identifies counterfeit collectible stamps


August 16, 2013

Scientists have discovered an easier new way of detecting bogus rare stamps  (Image: Shutt...

Scientists have discovered an easier new way of detecting bogus rare stamps (Image: Shutterstock)

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Here’s good news for all you philatelists out there – scientists have discovered an easier new way of detecting counterfeit rare stamps. Unlike some existing methods, it doesn’t require the destruction of any part of the stamp, and can be done quickly by anyone who has access to the necessary equipment.

First of all, it’s probably news to some people that there even are such thing as counterfeit stamps. Considering that some of the world’s most valuable stamps are worth several million dollars, however, it becomes easy to see why some unscrupulous folks would look into cranking out their own convincing copies.

Traditionally, the authenticity of rare stamps has been verified by destructively analyzing individual components of them (such as a sample of the ink), or through inspections performed by highly sought-after experts.

A team from Italy’s Università del Salento instead tried using a technique known as infrared spectroscopy. Putting it simply, IR spectroscopy involves subjecting a sample of material to a beam of infrared light, and studying how that material absorbs the light. Because known molecules absorb IR light at specific frequencies, the presence of those molecules can be inferred when light transmitted at that frequency is absorbed.

A rare 1961 Gronchi Rosa stamp, and a copy which was detected using the new technique
A rare 1961 Gronchi Rosa stamp, and a copy which was detected using the new technique

The researchers took a wide variety of Italian stamps (dating as far back as 1850) that were known to be authentic, and used the technique to produce a profile of each stamp’s components – these components included its paper fibers, fillers, inks, adhesives and coatings. Other stamps were then also analyzed, to see if they matched up with the profiles of the authentic stamps that they claimed to be. Out of 180 stamps tested, the IR spectroscopy technique detected two fakes.

According to the scientists, the process is simple, precise and immediate. A paper on their research was recently published in the journal Analytical Chemistry.

Source: American Chemical Society

About the Author
Ben Coxworth An experienced freelance writer, videographer and television producer, Ben's interest in all forms of innovation is particularly fanatical when it comes to human-powered transportation, film-making gear, environmentally-friendly technologies and anything that's designed to go underwater. He lives in Edmonton, Alberta, where he spends a lot of time going over the handlebars of his mountain bike, hanging out in off-leash parks, and wishing the Pacific Ocean wasn't so far away.   All articles by Ben Coxworth
1 Comment

I give it 2 years before the counterfeiters can make a stamp pass the test.

17th August, 2013 @ 12:49 am PDT
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