This paper introduces the Authentix LumaChrome® optical thin film, based on the optical interference characteristics of deposited thin films for high production manufacturing. LumaChrome has been used to authenticate banknotes for over 20 years, and this colour shifting film changes from one colour to another distinct colour when tilting the film yielding an intuitive and easy to use solution which is extremely difficult to replicate.
Availability in multiple formats from a security patch for government ID cards to full thread insertion into banknotes, LumaChrome is a highly versatile and powerful tool for securing documents and products. With the ability to create several standard colour-shifts over a wide range of saturation levels, Authentix can create a lasting security feature that experiences virtually no degradation over the lifetime of the substrate.