Effects of Different Compositions and Preparation Methods on Nickel Release in Alloy Adornments

Nickel is widely used in a broad range of products. It is shown that when skin has contact with these materials on a daily basis may cause nickel allergy. In accordance with the different compositions and preparation methods for the preparation of alloy adornments, the nickel release was tested. The results suggested that the nickel release increases with the increasing nickel contents of the same base material alloy adornments, the nickel release of alloy adornments produced by stamping process is lower than those produced by the lost wax casting process with the same nickel content. The amount of nickel release is significantly affected by the addition of noble metals.