Spoons are electroplating products made of alloy pressure casting.

The spoon with colored surfaces are of electroplating. Plating product will not easily fade under normal use.It is easily be oxidized if soaked in salty, acid, alkaline and not be cleared. The best way is to clean and dry it when store it Prolonged exposure to humid air, gold, silver would be more susceptible to oxidation. However, copper and antique brass plating are more durable.