The tarnishing of sterling silver alloys deteriorated the surface quality of jewelry greatly. The principles and methods of designing the alloying compositions of anti-tarnishing silver alloys were approached including multi-elements and small quantity alloying

meeting the requirements of different manufacturing properties

various strengthening approaches

wide processing maneuverability

low cost and friendly environment

and so on. It is pointed out that the composition of anti-tarnishing sterling silver alloy should be designed based on three preliminary procedures. Based on above principle

the composition range of the alloy suitable for different producing techniques were determined

and their properties were measured in laboratory and in industrial production

respectively. The results show that the series JIS silver alloys have excellent anti-tarnishing and manufacturing properties

exhibiting desirable comprehensive properties.