What is used in the ink used for voting?

 The ink used for voting can vary depending on the specific voting system and the regulations in place in a given jurisdiction. In some cases, the ink used for voting is a special, indelible ink that is designed to be difficult to remove and to prevent multiple voting.

One common type of ink used for voting is called "indelible ink," which is a type of ink that is difficult to remove and that leaves a permanent mark. Indelible ink is often used in elections to prevent multiple voting and to help ensure the integrity of the voting process. Indelible ink is typically applied to a voter's finger or thumb after they have cast their ballot, and it can be used to prevent them from voting again in the same election.

Other types of ink may also be used for voting, depending on the specific voting system and the regulations in place. For example, some voting systems may use special pens or markers that are designed to be difficult to erase or alter, or that use ink that is resistant to tampering.

Overall, the ink used for voting is typically designed to help ensure the integrity of the voting process and to prevent multiple voting.