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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]
It consists of a prefix letter and five digits designating a material composition. For example, a prefix of S indicates stainless steel alloys, C indicates copper, brass, or bronze alloys, T indicates tool steels, and so on. The first 3 digits often match older 3-digit numbering systems, while the last 2 digits indicate more modern variations.
Stainless steel table with glass plate top. The chairs are polypropylene composite plastic with stainless steel legs. Metal furniture is furniture made with metal parts: iron, carbon steel, aluminium, brass and stainless steel. Iron and steel products are extensively used in many application, ranging from office furnishings to outdoor settings.
Vintage Revere Ware, manufactured before 1968 and carrying the prized "Process Patent" maker's mark on the thick copper bottom, is finding its way back into modern kitchens. (Photo courtesy of Blane van Pletzen-Rands) Revere Ware was a line of consumer and commercial kitchen wares introduced in 1939 by the Revere Copper and Brass Corp.
Bismuth bronze or bismuth brass is a copper alloy which typically contains 1-3% bismuth by weight, although some alloys contain over 6% Bi. This bronze alloy is very corrosion -resistant, a property which makes it suitable for use in environments such as the ocean.
Pewter was a leading material for producing plates, cups, and bowls before the wide adoption of porcelain. Mass production of pottery, porcelain and glass products have almost universally replaced pewter in daily life, although pewter artifacts continue to be produced, mainly as decorative or specialty items. Pewter was also used around East Asia.
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A copper object with copper carbonate on its surface. Earlier, copper and brass vessels were used because of their high conductivity. [6] High conductivity of copper vessels reduces the fuel cost. However, a chemical reaction between copper and oxygen called oxidization turns the copper vessels black. [7]