Amethyst A50-RIG is a GREENGUARD Gold certified premium quality rigid UV ink, with superior media adhesion qualities, designed for rigid applications and is suitable for LED as well as conventional UV lamps. It is suitable for use without primer, on a large variety of rigid substrates, including: Polycarbonate, Melamine, Fluted Polypropylene as well as Decorative Applications on Glass, Acrylic and Ceramics.