Overprinting is a method of adding an additional layer of text or graphics above artwork, it results in a vintage effect reminiscent of postal stamps and bank notes. This .psd generator allows you to emulate the overprinting effect with a grayscale background image layer and up to 3 additional single color layers. Note: Any image can be used for the background layer, but the artwork that you add to the 3 overprint layers must have a transparent background.