One of the tricks used to make currency harder to counterfeit is being made
available to manufacturers to mark their goods as the genuine article. The
invention, licensed from Oak Ridge National Laboratory in Tennessee and made by
Tracer Detection Technology, uses tags consisting of fluorescent dichroic fibres
of nylon. The tags, which can be woven into fabric, fluoresce when they absorb
polarised light and can be detected by a scanner. Tracer claims the tags will be
quick to scan and almost impossible to forge.
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