The conversation between human and AI assistant.
How secured is the new 2000 and 500 currency notes?
Can you tell me more about the security thread and optically variable ink?
Sure. The security thread in the new notes has the denomination numeral printed on it, which can be seen under ultraviolet light. The thread also changes color from green to blue when the note is tilted. The optically variable ink used in the notes changes color from green to blue when viewed from different angles.