Define Sheffield plate.

Sheffield plate refers to a type of silver-plated metalware that gained popularity in the 18th and 19th centuries. It was developed in Sheffield, England as a more affordable alternative to sterling silver. The process involved fusing a thin sheet of silver onto a base metal, typically copper. This technique allowed manufacturers to create items that resembled solid silver but were more cost-effective. Sheffield plate had a significant impact on the decorative arts industry, enabling the production of various household items like tea sets, candlesticks, and serving trays. The manufacturing process of Sheffield plate involved several steps. First, a thin sheet of silver was heated and then fused onto a thicker sheet of copper, creating a composite material. This composite sheet was then shaped into the desired form, often through techniques like stamping or pressing. The final product was refined and finished to resemble solid silver, with details such as engravings or chasing added for further embellishment. The popularity of Sheffield plate eventually declined with the rise of electroplating methods in the late 19th century, which provided a more efficient and durable silver-plating technique.