We call Polymer, banknotes in "plastic". The first banknote in "plastic" was made in Australia. Indeed, a 1966 counterfeit 10-dollar bill , motivated the Australian's Central Bank to develop new technics to manufacture currency. The Polymer is printed according to the same methods as the traditional paper money. The main advantage of the Polymer lives in the fact is extremely difficult to reproduce and its life expectancy, superior to the "paper" banknote Under tropics, (this life expectancy is four times superior, that is more than two years instead of 6 months). More and more countries use this technique.