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Chemical detection

Chemical detection is a method of authenticating banknotes using a special chemical pen or marker. The principle is based on a chemical reaction between the solution in the pen and the material from which the banknote is made. Genuine banknotes are printed on a specific paper that differs from ordinary office paper in its composition - it does not contain starch. If this pen is run over a counterfeit banknote, which is usually made from normal paper with starch, a chemical reaction takes place and the trace left behind darkens, usually to a black or dark brown colour. In contrast, on a genuine banknote, the solution does not react and the line remains light, typically yellowish or transparent, and often disappears completely after a while. This method tests only the properties of the paper and does not test other security features such as watermarks, holograms or special printing techniques.

Offer of Counterfeit Detectors
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