| 摘要 |
PROBLEM TO BE SOLVED: To provide a gold alloy for decoration, which exhibits a color close to pure gold and causes no practical problem with mechanical properties. SOLUTION: The gold alloy for decoration has an Au-Ag-Cu ternary system comprising 83-92 wt.% Au and the balance Ag and Cu with unavoidable impurities, has Ag wt.%/Cu wt.% of 1.4-1.6, and has a hue angle of 79.6 degrees to 80.6 degrees, when measured in a light of D65 illumination and a visual field of 10 degrees, based on the colorimetry method of receiving an 8 degrees (d/8°) diffused light (including a regular reflection light) type complying with JIS. Thereby, the alloy exhibits the same hue as gold and a very close appearance to gold, and develops a practically non-problematic level in the mechanical properties of a cast state or a machined state due to the additional elements. COPYRIGHT: (C)2004,JPO
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