Understanding the Indelible Ink Used in Indian Elections

As India engages in assembly elections across five states, the use of indelible ink raises questions about its properties. This article delves into why the blue ink applied to voters' fingers is so durable and the exclusive company responsible for its production. Learn about the chemical composition of the ink, its historical significance, and how it prevents multiple voting. With insights into the science behind this essential election tool, readers will gain a deeper understanding of its role in the democratic process.

By Narendra Chaudhary Apr 15, 2026, 13:23 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 individuals from voting multiple times.

Why Does the Voting Ink Not Easily Wash Off?

Recently, a question has emerged on social media regarding the durability of the ink applied during voting. What makes this ink so persistent on the skin? In this article, we will explore some fascinating facts about this voting ink.

Exclusive Manufacturer of Voting Ink

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

Since 1962, the company 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 Wash Off Immediately

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, making it difficult to remove quickly.

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 established in India until the 1962 elections, aimed at preventing re-voting.