These are the methods to check a currency note for authenticity:
1:SEE THROUGH REGISTER
The floral design printed both on the front and reverse in the middle of the vertical band next to watermark window has the denomination ‘500’.Half of the number is printed on the obverse and the half
on the reverse.Both the printed portions have an accurate back to back registration so that the numeral appears as one when viewed against light.
2.IDENTIFICATION MARK:
A circle with the intaglio print which can be felt by touch,helps the visually impaired to identify the
denomination.
3.WATERMARK
The portrait of Mahatma Gandhi ,the multi-directional lines and an electrolyte mark showing the denominational numeral ‘500’ appear in this
section and these can be viewed better when the backnote is held against light.
4.OPTICALLY VARIABLE INK (OVI)
5.The colour of numeral ‘500’ appears green when the note is held flat but would change to blue when the note is held at an angle.The font size is reduced.
5.INTAGLIO PRINTING
The portrait of Mahatma Gandhi,the Reserve Bank seal,Guarantee and Promise clause,Ashoka
pillar emblem on the left,RBI Governor’s signature in the backnote and the identification mark for
the visually impaired are printer intaglio,which can be felt by touch.
6.MICROLETTERING
The letters ‘RBI’ and the numeral ‘500’ can be viewed with the help of a magnifying glass in the
zone between the Mahatma Gandhi portrait and the vertical band.
7.LATENT IMAGE
The vertical band contains latent image showing the numeral ‘500’ when the backnote is held
horizontally at the eye level.
8.SECURITY THREAD
3.00 mm wide security thread with inscriptions ‘^maV’ and ‘RBI’ and colour shift from green to blue when viewed from different angles.It will fluoresce yellow on the reverse and the text will fluoresce on the obverse under ultraviolet light.The thread is visible as a continuous line from behind when
held up against light.
Source:RBI
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