Definitions for "Sheffield plate"
True Sheffield Plate was produced by fusing, with intense heat, a thin sheet of silver to one or both sides of a thick sheet of copper. The composite metal was then rolled down to the proper thickness for fabrication. Invented by Thomas Boulsover about 1743, it was rampant by the 1760s throughout England and Europe. Most frequently called Old “Sheffield Plate” to distinguish it from electroplate.
Fusion of copper and silver sheet originally produced in the first half of the 18th Century.
A mechanical process of fusing a thin sheet of silver to a thicker core of copper by means of heating and rolling. This process was invented by Thomas Boulsover in Sheffield in the mid-eighteenth century and proved to be very popular. By 1765 the sandwiched metal was being used to make objects that imitated silver, yet were less expensive, even though the actual fabrication was much more difficult. Sheffield Plate was made until around 1860 although the technique had already begun to be replaced by electroplating in 1840.