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The term ticket It has several uses according to the context. The most common meaning is linked to paper money : that is, the document printed by the authorities that is used as legal means from payment .

For example: “To buy this car you will need many tickets”, “Yesterday they gave me a fake ten peso bill”, “I don't have a single ticket: I don't know how I will buy food”.

This concept, in this sense, is the ticket of Bank . This is fiat money (based on trust) issued by the monetary authority of a country. These banknotes were created to replace or complement metal coins, which are difficult to transfer and store in large quantities.

The first bills were created in the 7th century in China . Just in the XVII century they were adopted in the European continent, and in the following century they expanded throughout the world .

Just as it happened and continues to happen with the coins of metal , which at the time were made of gold or silver, the bills also suffered the inevitable forgery by those who do not wish to obtain their own money by legal and fair means. With the paper, the counterfeit proliferated and became simpler, partly because it assumed a much lower cost than in the case of metal coins.

In order to avoid fakes or at least control it to minimize its spread, the banks have been applying various measures for several decades security , which have evolved over time to deal with the ingenious tactics of counterfeiters. It should be mentioned that making marks on the tickets or altering their form can also result in a penalty.

At present, the elaboration of banknotes is carried out with elongated cotton fibers to achieve a very difficult role to imitate; In addition, techniques of Print in several layers, and thus they obtain the watermarks, the invisible ink and the holograms, that allow to distinguish a false ticket from a legitimate one. Let's see below some of these measures in detail:

* watermark : also called filigree and consists of printing one or several images that are formed from different levels of thickness on the paper. In order to appreciate a watermark it is necessary to look at the banknote;

* bleach : to avoid counterfeiting with plain paper, this technique It is based on the use of paper without optical brighteners for a part of the bill or for its entire surface. To detect it, it must be observed using an ultraviolet light lamp;

* reliefs : they can be seen by running your fingers over the bill;

* optically variable ink : East material It changes color according to the angle at which the light falls.

Apart from cotton, it is common for paper money to be made with textile fibers such as linen. Some countries manufacture them in polymer to increase their resistance, and add a small cap transparent with a thickness of a few millimeters, something that is especially difficult to falsify for less experienced criminals with few resources. This technique is applied in Mexico, Australia, Paraguay, Brazil, Guatemala, Hong Kong, Chile and New Zealand.

The ticket concept is also used to name the role granted by the right to use a conveyance or to enter an enclosure and the ticket that documents the participation of a lottery or of a draw : “My parents gave me a plane ticket to get to know Paris”, "Tomorrow I'm going to buy the train ticket", “Where is the ticket? The raffle will be held in a few minutes ... ”.

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