Substrate of plastic banknotes

From the birth of plastic banknotes to the present, the legal plastic banknotes issued by countries all over the world have adopted the following two materials as the printing carrier of plastic banknotes:

① Tyvek substrate

Registered trademark of DuPont Company, USA. Compared with paper money, it has the following characteristics: thin thickness, light weight, difficult deformation, soft and smooth, tough, tear-resistant, opaque, moisture-proof, waterproof, low surface friction and high elasticity. For most inks, it takes a long drying time. In view of the above characteristics, the United States only issued small denomination experimental banknotes in seven countries and regions: Costa Rica, Haiti, Honduras, Ecuador, El Salvador, Isle of Man and Venezuela, but in the end it was difficult to become a climate.

② monitoring matrix

Registered trademark of Australian security company. Securency, located in Melbourne, Australia, is recognized as the world leader in anti-counterfeiting plastic banknotes and anti-counterfeiting plastic certificate substrates. The Guardian substrate registered and produced by the company is specially used for printing plastic banknotes, and has been widely used in plastic banknotes in more than 33 countries and regions around the world. It is the only base of plastic banknotes in the world today, and it is also the main definition of plastic banknotes today.

Guardian substrate was successfully developed by —CSIRO, Australia's major scientific research institution. In view of the fact that Guardian substrate itself does not absorb ink and cannot be printed directly on it, Australia has specially developed a white coating. When printing banknotes, first brush the white paint back and forth on both sides of the substrate for 5 times. Because white paint can absorb ink, after drying, the substrate can be printed in a general banknote printing factory. In order to leave an anti-counterfeiting transparent window, a small part of the area should be specially covered when painting, so that the covered area will not be covered by white paint and remain transparent. Because the texture of Guardian substrate is close to that of banknote paper, it has no fiber, no pores, anti-static, anti-oil stain and anti-copying. Therefore, it is difficult for criminals who forge counterfeit money to imitate similar plastic substrates. The guard substrate itself is an effective anti-counterfeiting measure. Because this technology belongs to Australia's patent, other countries have to pay a high price if they want to print plastic banknotes.