Distinguishing papers of embedding security thread with relevant morphological features

To distinguish the papers embedded of security thread with which to have the formation method based so that the papers commonly used for counterfeit banknotes were to classify through analysis of the thread’s morphological characteristics, with purpose to provide a new technical means for counterfeit banknotes to have them concatenated and traced into source. The papers of embedding security thread were observed and analyzed with VSC6000 comparator, electronic microscope and energy dispersive spectrometer (EDS), successfully having their embedding security threads delved and known into the morphological features. Consequently, the papers were to classify on the basis of characteristic formation of the security threads. The security threads of the tested papers are of three types: composite, concave and convex. The papers used for counterfeit banknotes could be classified and determined of their source from the morphological features of those relevant embedded security threads, hence could play a crucial role in concatenating cases, tracing sources and precisely attacking crimes of counterfeit banknote.