According to an article on GulfNews.com dated 7 July 2015, on 8 July the Central Bank of the UAE will introduce 5- and 500-dirham notes with tactile marks (not Braille) so that they will be readable by the visually impaired, just like the 50- and 100-dirham notes introduced on 9 March.
cost this printing note is average between 66 and 1 dirham & 32 fils or between 18 and 36 us cents to produce enhance/upgrade security feature, modified 1,000 and 500 UAE dirham note′
example seigniorage: 4 india rupees to produce 2,000 india rupees note’