Title:
DECORATIVE WHITE ALLOY
Document Type and Number:
WIPO Patent Application WO/2004/048626
Kind Code:
A1
Abstract:
A decorative white alloy, characterized in that it comprises 3 to 20 % of Cu, 2 to 10 % of Ag, and the balanced amount of Pd, or in that it comprises 3 to 20 % of Cu, 2 to 10 % of Ag, at least one of 0.5 to 3 % of Au and 0.5 to 3 % of Pt, and the balanced amount of Pd. The above decorative white alloy is free from or reduced in the following problems associated by conventional decorative white alloys, that is, those that Pt or its alloy is high in the price of the metal itself and also has a great density, and thus one piece of Pt or its alloy product is apt to become thinner or smaller; in white gold, i.e. an Au based alloy, a Ni type white gold has a problem of metal allergy and a Pd type requires an Rh plating owing to its blackish or yellowish color tone; and Ag or its alloy has a problem of discoloration by sulfuration.
Inventors:
WATANABE OSAMU
OSADA MASAMI
MITSUI NORIO
OSADA MASAMI
MITSUI NORIO
Application Number:
PCT/JP2003/014908
Publication Date:
June 10, 2004
Filing Date:
November 21, 2003
Export Citation:
Assignee:
TOKURIKI HONTEN KK (JP)
International Classes:
A44C9/00; C22C5/04; C22C5/08; (IPC1-7): C22C5/04
Foreign References:
| JPS50160797A | 1975-12-26 | |||
| JPS434099B1 | ||||
| JPS609844A | 1985-01-18 |
Attorney, Agent or Firm:
Kanakura, Kyoji (Shinbashi 1-chome Minato-ku, Tokyo, JP)
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