Cloisonne : the colors on the cloisonne badges/lapel pin will keep/reserve for almost 100 years. It's as hard and glossy as ceramic. It must be bake under over 800 degrees Celsius per color. Yet the coloration confines to 156 specific cloisonne colors, not as many as pantone color chart. Only copper is available for cloisonne badges due to the features of captioned metal. Advantage: elegant, long preservation. Disadvantage: higher cost, longer production time, colors are limited. Cloisonne badges are ideal for collection.