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The EURion constellation is made up of five rings. The EURion constellation (also known as Omron rings [1] or doughnuts [2]) is a pattern of symbols incorporated into a number of secure documents such as banknotes, cheques, and ownership title certificates designs worldwide since about 1996.
Features can be built into the thread material e.g., microprinting on a transparent plastic thread or adding materials so they fluoresce under ultraviolet light. The thread is a difficult feature to counterfeit, but some counterfeiters have been known to print a thin grey line or a thin line of varnish in the area of the thread. [citation needed]
Security thread [81] – A black magnetic thread in the centre of the note is only seen when held up to the light. It features the denomination of the note, along with the word "euro" in the Latin alphabet and the Greek alphabet. Magnetic ink [81] – Some areas of the euro notes feature magnetic ink. For example, the rightmost church window on ...
Secured documents, such as banknotes, use visible and tactile features to allow humans to verify their authenticity without tools. The European Central Bank (ECB) recommends feel, look, and tilt: [2] First check the tactility of the banknote (including the substrate), then look at the optical design and finally the characteristics of certain optical features when tilting the banknote in ...
Another security feature is based on windows in the paper, which are covered by holographic foils to make it very hard to copy. Such technology is applied as a portrait window for the higher denominations of the Europa series (ES2) of the euro banknotes. [11]
The euro was implemented on 1 January 1999, when it became the currency of over 300 million people in Europe. [12] For the first three years of its existence it was an invisible currency, only used in accountancy. euro cash was not introduced until 1 January 2002, when it replaced the national banknotes and coins of the countries in eurozone 12, such as the French franc and the Spanish peseta.
The optical security device was the most effective security feature, used to correctly identify 98% of counterfeit banknotes and 95% of genuine banknotes. [48] Detecting counterfeits using only touch was 74% effective for the $10 banknote and 82% effective for the $20 banknote.
Older security features such as interwoven red and blue silk fibers, microprinting, and a plastic security thread (which now glows pink [nominally red] under a black light) were kept. The individual Federal Reserve Bank Seal with district letter was changed to a unified Federal Reserve System Seal along with an additional prefix letter being ...