The metallic plastic cards have two parts of printing: the metallic background is screen printed and then we litho print on top. As the ink is transparent so after litho printing, the metallic effect comes out from the background and looks gorgeous. Metallic plastic cards are full colour printed as well to give all the details of your artwork, you can also to use Spot Metallic Silver Ink to print metallic cards in a different way. Price is only £20 extra on standard plastic cards. http://www.e-plasticcard.co.uk/