The term signifies a base metal item covered with a thin layer of gold. The “18k” indicates the purity of the gold used in the plating process, meaning 18 out of 24 parts are pure gold, with the remaining six parts consisting of other metals. As an example, a bracelet described this way features a core material, such as brass or stainless steel, with a surface coating of 18k gold.
This process allows for the aesthetic appeal of gold at a more accessible price point than solid gold pieces. It provides a cost-effective alternative for individuals seeking the appearance of gold jewelry or decorative items without the significant expense associated with higher gold content. Historically, plating techniques have been employed to enhance the appearance and value of objects made from less precious materials.