As India heads to the polls starting next month, workers hunched over boxes at a factory in the southern city of Mysuru race to finish producing millions of bottles of indelible ink for the world's largest election.

For decades, India has used the ink, made primarily from silver nitrate, to mark voters after they have cast their ballot to prevent duplicate votes and fraud.

WATCH MORE: https://thestartv.com/c/news
SUBSCRIBE: https://cutt.ly/TheStar
LIKE: https://fb.com/TheStarOnline