Metallic finish buttons are printed on a transparent polyester sheet instead of white paper. Therefore the elements in your artwork that would normally show as white will be transparent, showing the metal shell through the button. All other colors will have a metallic look to them as well. The lighter the color, the more the metal will show through. The more opaque the color is, the less of the metal will show. If you’ve never ordered metallic buttons before, we recommend placing a small quantity order to ensure your design works well with the process.