The application of a thin layer of gold onto a base metal is a common technique in jewelry manufacturing. The “18k” designation refers to the gold’s purity, indicating that 18 out of 24 parts of the metal are gold, with the remaining portion consisting of other alloys. When this 18k gold is applied as a plating over a different, more affordable metal core, the resulting item offers the appearance of solid gold at a reduced cost. For example, a necklace might be created from a base metal like stainless steel or brass, and then coated with a layer of 18k gold.
This process provides several advantages. It allows for the creation of visually appealing jewelry that is more accessible to a wider range of consumers due to its lower price point compared to solid gold items. The technique also allows for design flexibility and can be applied to various base metals, enabling a diverse range of styles. Historically, this method has been employed to create affordable imitations of precious metal jewelry, dating back centuries in various cultures.