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OSP Pair of table salts, the interiors gilded to prevent corrosion. 'Bleeding' of the copper can be seen on the rims. Old Sheffield Plate (or OSP) is the name generally given to the material developed by Thomas Boulsover in the 1740s, a fusion of copper and sterling silver [1] which could be made into a range of items normally made in solid silver. [2]
Whether silver plating or pure silver, the composite of the metal will tarnish when exposed to air and sulfur. Tarnish is a chemical reaction on the surface of metal (copper, brass, silver, etc.) and causes a layer of corrosion. In the case of silver tarnish, the silver combines with sulfur and forms silver sulfide (Ag 2 S), which is
The factory added to its products sterling goods and high-grade nickel-silver-plated ware, both flat and hollow. Still later, by experiment, Mr. Wallace devised a new process of manufacture from steel. It made a less bulky, firmer, and a lighter base for silver plating. Also in 1871, Wallace, his sons, and sons-in-law formed a new company.
Its value is estimated anywhere from $175,000 up to $10,000,000, depending on condition. ... Antique Silverware. Sterling silver flatware, tea sets, and serving pieces, particularly from high-end ...
"The words "silver" and "sterling silver" describe a product that contains 92.5% pure silver. Silver products sometimes may be marked 925, which means that 925 parts per thousand are pure silver. Some jewellery described as "silver plate" has a layer of silver applied to a base metal. "Coin silver" is used for compounds that contain 90% pure ...
Gorham Silver was founded in 1831 in Providence, Rhode Island by Jabez Gorham, [3] a master craftsman, in partnership with Henry L. Webster. [4] The firm's chief product was spoons of coin silver. The company also made thimbles, combs, jewelry, and other small items.
In 1872, the Derby Silver Company began production in Derby, CT. Over the years, the company made bathroom-related items, clocks, tableware and flatware, tea sets, candlesticks, fruit baskets, dishes, and more object types made of silver and silver plate. [2] The Derby Silver Company operated showrooms in New York, Chicago, and San Francisco. [1]
Lunt Silversmiths was an American manufacturer of fine sterling, silver-plate and stainless steel flatware, holloware, and giftware established in 1902. History [ edit ]