Breakthrough anti-counterfeiting tech creates hidden security features in materials

The portrait of Mookpododo – an ink on-silk painting of grapes featured on the genuine Korean ₩50,000 bill – radiates a bright fluorescent green, an effect achieved through security ink that is visible under ultraviolet (UV) light. This feature remains concealed from the naked eye and is intended for use by professionals in financial institutions and other high-security environments.