varifeye® Secure Windows for simple authentication and optimum protection
varifeye Secure Windows provide authentication that’s as clear as black or white. Attractive design features within the varifeye Secure Window change in contrast as a banknote is moved over a black or white background.
Against a light background, a series of the letter “V” appear in the banknote window in the example shown. Against a dark background, the letters disappear and are replaced by a green-black cross-shaded design in the shape of a book. The complex production process ensures varifeye windows are secure against counterfeiting.