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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]
Thomas Boulsover. Thomas Boulsover (1705 – 9 September 1788), was an English Sheffield cutler who invented Sheffield Plate.He made his fortune manufacturing various items, but especially buttons using the process, he later diversified into making cast steel and saws.
The firm of Thomas Bradbury and Sons, silver platers, is represented by day books, ledgers, orders, correspondence, etc., going back to the 1780s. A particular feature of this collection is the fine series of early engraved catalogues of old Sheffield plate.
This prospered and in 1762–65 Hancock built the water-powered Old Park Silver Mills at the confluence of the Loxley and the Don, one of the earliest factories solely producing an industrial semi-manufacture. Eventually Old Sheffield Plate was supplanted by cheaper electroplate in the 1840s. In 1773 Sheffield was given a silver assay office. [64]
Household silver or silverware (the silver, the plate, or silver service) includes tableware, cutlery, and other household items made of sterling silver, silver gilt, Britannia silver, or Sheffield plate silver. Silver is sometimes bought in sets or combined to form sets, such as a set of silver candlesticks or a silver tea set.
Although items hand-plated with metal leaf date back to ancient times, large scale production dates to 1742 when Thomas Boulsover, of Sheffield, England developed a process by which silver plates were fused to base metal (generally copper) ingots by heating them in a furnace with borax. [2]
"Guide to Marks of Origin on British and Irish Silver Plate from Mid 16th Century to the year 1950 and Old Sheffield Plate Makers' Marks 1743 - 1860" compiled by Frederick Bradbury F.S.A.(1950). This was done within the Globe Works premises. The business was eventually transferred to his son George Bishop and became George Bishop and Sons.
This timeline of Sheffield history summarises key events in the history of Sheffield, a city in England. The origins of the city can be traced back to the founding of a settlement in a clearing beside the River Sheaf in the second half of the 1st millennium AD. The area had seen human occupation since at least the last ice age, but significant growth in the settlements that are now ...