In 2006, a visible security thread with micro-inscriptions, made of plastic was embedded into the paper when the banknote paper was manufactured. Security threads are madeof either metal or plastic. The inscriptions on the 1.4 mm silver coloured security thread read ‘RBI’ and ‘BHARAT’ in Hindi. The woven security thread is visible in one straight line when viewed against light. The see-through register from these notes onwards had the denomination ‘10’when viewed against light. The watermark of these notes changed and ‘five horizontal bars’ were seen beside ‘RBI’in the centre along with ‘Mahatma Gandhi’s portrait’ on the left and ‘10’on the right. On the reverse, the year of issue of the note was printed near the lower margin from 2006 onwards.
The Reserve Bank of India issued notes with a Star ‘*’ after the first three characters of the prefix followed by the six-digit serial number from 2006 onwards. These notes with the ‘*’ in between the prefix and serial numbers are used as replacement notes for errors in printing. These replacement notes were issued initially in denominations of Rupees Ten, Rupees Twenty and Rupees Fifty. Subsequently, the replacement notes were issued in Rupees One Hundred and more recently in Rupees Two Hundred and Rupees Five Hundred.
The year of issue of the note was printed on the reverse of these notes.
In 2011 the Rupee symbol was introduced for the first time in Indian Banknotes. The symbol of the Rupee was created by D. Udaykumar and adopted on July 15, 2010. This symbol was derived from the Devanagiri letter ‘Ra’. Rupees Ten was the first denomination printed and issued in India using the new Rupee symbol. On the obverse, this symbol is seen before the denomination ‘10’on the top left corner and also to the right below the serial number. On the reverse, the Rupee symbol with the denomination is above the language panel.
In the year 2015, Rupees Ten notes printed have the serial numbers in ascending fonts for higher security. The alpha-numeric characters of the prefix are constant in size and the numerals in the serial are in ascending fonts from left to right.
A newly designed Rupees Ten note in a smaller size with the portrait of Mahatma Gandhi was issued in 2017. The watermark has the ‘portrait of Mahatma Gandhi’ and ‘10’ on the right, ‘five horizontal bars’ beside ‘RBI’ written vertically and ‘10’ to the left corner. Fluorescent fibers that glow under ultraviolet light have been embedded in the watermark paper. The demetalised security thread has the words ‘Bharat’ and ‘RBI’. The base colour of these notes is chocolate brown with the portrait of Mahatma Gandhi in the centre facing right and micro-letters ‘RBI’, ‘Bharat’in Hindi and ‘10’ feature on the obverse. There are geometric patterns in the four corners aligned with the overall colour scheme both on the obverse and reverse. The see-through register reads as numeral ‘10’when viewed against light. The numeral ‘10’ in Devanagari script is used for the first time on the obverse.
The reverse has a vignette of the Sun Temple, Konark with the language panel beside it. The year of printing is at the left. The words ‘Swachh Bharat’ are printed in Hindi within the outline of Mahatma Gandhi’s spectacles on the reverse of the note. The Clean India Mission line ‘ek kadam swachhatha ki aur’ in Hindi is printed below this logo.
Special kinds of flax in cotton are added to the cellulose when banknote paper is produced. Banknote paper is made from cotton, which is first made into a pulp and then converted to paper. Withthis the weight of the paper is between 80-90 gm. per sq. mt. The banknote paper is infused with polyvinyl alcohol or gelatin to give it extra strength. The portrait of Mahatma Gandhi, the multi-directional lines and an electrolyte mark showing the denomination numeral ‘10’ appear in the section. These can be viewed when the banknote is held against light.
Banknote ink consists of dry colour pigments that are mixed with oil and extenders to create an unusually thick ink which will react in a very specific way to the paper used. This is to prevent counterfeiting of notes.
The Reserve Bank of India solely decides the volume and value of the banknotes to be printed based on past and current demand. RBI does this on a statistical model and trend analysis with inflation, growth and demand are some of the parameters for this model.
Rupees Ten is the most popular and widely circulated denomination and is printed in large volumes.