Understanding the Indelible Ink Used in Indian Elections

As India engages in assembly elections across five states, the use of indelible blue ink raises questions about its durability. This article delves into the science behind the ink, its exclusive manufacturer, and why it remains on voters' fingers for an extended period. Learn how this ink, made from silver nitrate, interacts with the skin and why it takes days to fade. Discover the history of its implementation in elections and its role in preventing fraudulent voting. Join us as we uncover the fascinating details of this essential component of the electoral process.

By Narendra Chaudhary May 7, 2026, 10:24 IST

Current Election Atmosphere in India

India is currently experiencing an election season, with assembly elections taking place in five states. Voting has already occurred in some areas, while it is still pending in others. When voters arrive at polling booths, a blue ink is applied to their fingers. This ink is designed to last for an extended period, preventing any individual from voting more than once.

Why the Voting Ink Doesn't Easily Wash Off

Recently, a question has surfaced on social media regarding why the ink applied during voting does not wash off easily. What is it about this ink that allows it to remain on the finger for so long before fading away? In this article, we will explore some fascinating facts about voting ink.

Exclusive Manufacturer of Voting Ink

In India, only one company is authorized to produce the ink used in elections. This company, Mysore Paints and Varnish Limited, does not sell the voting ink in retail; it is exclusively available for purchase by the government or election-related agencies. This company is the sole supplier of voting ink across the country.

Since 1962, Mysore Paints and Varnish Limited has held a special license granted by the National Research Development Corporation. This year, the Election Commission of India signed a contract with the company, with assistance from the Ministry of Law and the National Physical Laboratory, to supply ink for elections. The company also supplies electoral ink to other countries.

Why Voting Ink Doesn't Fade Quickly

The blue voting ink is formulated using silver nitrate. When this ink comes into contact with the salts present in the body, it forms silver chloride. This silver chloride remains attached to the skin when dissolved in water. If the ink is exposed to water, it changes from blue to black. The ink does not wash off easily.

It takes at least 72 hours for the ink to fade. During this time, the skin cells begin to shed, causing the ink to gradually disappear. This ink is also referred to as election ink or indelible ink. The practice of applying ink during elections was not in place during the first elections in India; however, it was implemented in the 1962 elections to prevent re-voting.