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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]
Silver requires a good deal of care, as it tarnishes and must be hand polished, since careless or machine polishing ruins the patina and can completely erode the silver layer in Sheffield plate. A silverman or silver butler has expertise and professional knowledge of the management, secure storage, use, and cleaning of all silverware ...
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.
It was located first at Silver Street (1806), Cornish Place (1822) Sheffield. Their registered trade mark since 1879 was a Trumpet with a Banner hanging from it. Although registered in 1879, the "Trumpet with Banner" logo was used at times before registration and appears on some of their silver plate pieces.
"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.
Plated tableware. Plated ware refers to articles chiefly intended for tableware consisting of a base metal or alloy covered by one of the precious metals, with the object of giving them the appearance of gold or silver. [1] Historically, the standard amount of precious metal used was an ounce of silver per square foot of surface area (2.8cL per ...
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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.