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|1. (WO2018083496) AUTHENTICATION AND TAMPER-DETECTION OF PRECIOUS METAL ITEMS AND OTHER ITEMS|
|Applicants:||THE ROYAL MINT LIMITED
|Inventors:||JAMES, David Mathew
MARTIN, Ciarán Joseph
THOMAS, Ellis Rhys
|Title:||AUTHENTICATION AND TAMPER-DETECTION OF PRECIOUS METAL ITEMS AND OTHER ITEMS|
Herein is disclosed, a method of plating an item with a first metal, the method comprising providing a plating solution comprising a liquid medium, a precursor species for forming a layer of the first metal on the items, and a plurality of luminescent particles suspended in the liquid medium, plating the item within the plating solution, such that the precursor species forms the layer of the first metal on the item and the luminescent particles are deposited within the layer of the first metal while it is formed, wherein the item is held substantially stationary in the plating solution during plating, and/or a plurality of items are plated and the items do not move relative to one another, and wherein the first metal is a precious metal selected from gold, silver, platinum, palladium, ruthenium, osmium, rhenium, rhodium and iridium. Apparatus and plated items are also disclosed.