公开(公告)号：WO2021148862A1

公开(公告)日：2021-07-29

申请号：PCT/IB2020/061265

申请日：2020-11-30

Applicant: ARGOR - HERAEUS SA

Inventor： ROSSINI, Marta ,  ARNABOLDI, Sergio ,  NAUER, Marco

IPC: C22C5/02 ,  C22C1/02 ,  C22C1/03 ,  C22F1/14 ,  A44C27/00 ,  G04B37/22 ,  A44C27/003

Abstract: Tarnishing resistant Gold alloy for jewellery, comprising: - Gold in the amount comprised in the range [815-846] %o by weight, - Copper in the amount comprised in the range [120-154] %o by weight, - Silver in the amount comprised in the range [18-35] %o by weight - Platinum in the amount comprised in the range [1-10] %o by weight, - Palladium in the amount comprised in the range [7-15] %o by weight, wherein the Gold alloy is a quinary alloy, and wherein the Gold alloy so composed shows, under the conditions set forth in ISO DIS 8654:2017 standard, a color compatible with the 5N alloy color standard.