Indelible inks, election ink, election smudges, or phosphate inks are semi-permanent inks or dyes applied to electors' finger during elections to forestall election fraud like more than one voting. This is a successful strategy for nations where national identity documents are not really normalized or regulated. One of the more common election ink composition depends on silver nitrate and can stay for a weeks. The system was first utilized in the province of Mysore (presently Karnataka) during the 1962 Indian general election.
Election ink are utilized as a successful security component to forestall dual voting in elections. The ink is generally applied to the index finger of the left hand, particularly on the fingernail skin, where it is exceedingly difficult to quickly remove. Ink can be applied in a wide range of ways relying upon the circumstance and inclination. The most well-known techniques are by dip bottles with sponge inserts, bottles with brush tools, spray bottles, and marker pens.