Special Paper
Most banknotes are made of heavy paper, almost always from cotton fibres for strength and durability, in some cases linen or speciality coloured or forensic fibres are added to give the paper added individuality and protect against counterfeiting. Some countries including Romania, Mexico, New Zealand, Israel, Singapore and Australia produce polymer (plastic) banknotes, in order to improve wear and tear, and permit the inclusion of a small transparent window a few millimeters in size as a security feature that is very difficult to reproduce using common counterfeiting techniques. In November 2011 Canada joined the list of countries using polymer currency as it began the rollout of a new banknote series.
Read more about this topic: Security Printing
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