An alloy composed of 92.5% silver and 7.5% other metals, typically copper, provides a durable and workable base for jewelry and other decorative items. A thin layer of a rare, silvery-white, hard, corrosion-resistant metal from the platinum group is then applied to this base. This process enhances the underlying material’s luster and provides a protective barrier against tarnish.
The application of this protective layer increases the longevity and brilliance of the underlying item. It offers improved resistance to scratching and environmental factors that cause discoloration, therefore maintaining its aesthetic appeal over extended periods. Historically, similar protective platings have been utilized to enhance the durability and appearance of precious metals.