FIELD: measurement technology.
SUBSTANCE: method for identifying whether a paper product is marked, method includes comparing the functionalization of a sample of a paper product with the functionalization of a marked paper product, where the functionalization of the marked paper product has been altered by irradiation with accelerated electrons or accelerated particles heavier than electrons. In this case, the paper product is irradiated with a dose of at least 0.1 Mrad, and the electrons or particles have an energy of at least 0.25 MeV.
EFFECT: marking of paper products is proposed.
11 cl, 5 dwg
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