2010 - Sri Lanka - Currency note Security
The notes contain several current and new advanced security features as follows:
Each currency note depicts a different bird as the watermark, which is
the same bird portrayed on the note. In addition, the value in
numerals appears vertically as a highlighted watermark.
The security thread in Rs. 20, Rs. 50 and Rs. 100 is a thin polyester
thread embedded in to the note with the letters CBSL and the
denomination, while a Starchrome, security thread which changes
colour from red to green is included in Rs.5000, Rs.1000 and Rs.500
with the width of 3mm, 2.5 mm and 2 mm, respectively.
Cornerstone. watermark appears in the form of diagonal bars at each
corner of every currency note.
When the note is held up to the light, the numeral value of each note
on the front (near the butterfly) comes together in perfect register
with the reverse, on the back of the note.
Extra small text
When viewed closely below the butterfly, an area of text reading
"CBSL" and the numeral value can be seen in all the notes.
Blind recognition feature
A vertical order of heavily printed dots (with one dot for Rs. 20
note) progressing according to denomination appears on the left side
of the note to help the visually impaired to recognize the
Raised print area
A raised printed area with greater tactility is noticed in several
places on the notes. e.g. On the front of the note - the Bank title,
the central images, the value at the bottom edge of the note and on
the back of the note - the value at the bottom in numerals.
Text edited from CBSL
Press Release and webpage.