The severe deterioration exhibited by banknotes in circulation in Egypt triggered a research project into cause and effect. Did the problem originate in the banknote paper, which is supplied by UK and French mills, or in the conditions of importation and storage? Did it originate in the printing inks of the dry offset, intaglio and relief printing processes. Or, did it originate in the security devices built into the banknote paper? During the research project, hundreds of physical and optical tests were carried out in Milan at SSCCP, the Research Institute of the Italian Pulp and Paper industry. The US dollar was used as the reference banknote, against which the various properties of the Egyptian 25pi and 1LE and 5LE notes was compared.
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