Silver cyanide reaction with other anions. Some silver cyanides are luminescent. Both AgCN and KAg(CN) have been used in silver-plating solutions since at least 1840 when the Elkington brothers patented their recipe for a silver-plating solution. A typical, traditional silver-plating solution would contain KAg(CN) 15-40 gL, KCN 12-120 gL and KCO gL. Silver cyanide Silver cyanide is the chemical compound with the formula AgCN. This white solid forms upon treatment of solutions containing Ag with cyanide. This precipitation step is used in some schemes to recover silver from solution. Silver cyanide is used in silver-plating. Its structure consist of -[Ag-CN]- chains in
Britannia silver use by silversmiths from 1 June 1720, and thereafter Britannia silver has remained an optional standard for hallmarking in the United Kingdom and Ireland. Since the hallmarking changes of 1 January 1999, Britannia silver has been denoted by the millesimal fineness hallmark 958, with the symbol of Britannia being applied optionally. The silver bullion coins of the Royal Mint issued since 1997, known as "Britannias" for their reverse image, were minted in Britannia standard silver until 2012. Britannia silver should be distinguished from Britannia metal, a pewter-like alloy containing no silver. Britannia silver Britannia silver is an alloy of silver