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Title:
ORNAMENTAL MEMBER
Document Type and Number:
WIPO Patent Application WO/1997/020970
Kind Code:
A1
Abstract:
A white ornamental member comprising a base material, an undercoat plating layer formed on the base material in a thickness of 1 'mu'm or above and comprising copper (or its alloy), an Sn-Cu-Pd alloy plating layer formed on the undercoat plating layer in a thickness of 0.2 'mu'm or above and comprising 10-20 wt.% Sn, 10-80 wt.% Cu and 10-50 wt.% Pd as the essential components, and a finish plating layer formed on the alloy plating layer in a thickness of 0.2-5 'mu'm and comprising at least one member selected from among Pd, Rh and Pt. As this member does not contain any Ni component, it does not cause nickel allergy even when worn. Also it can be provided in a single color of white, gold or black and in the combination of these colors at a low cost.

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Inventors:
MATSUMOTO YOSUKE (JP)
TANOKURA YUKIO (JP)
HAMANO KAZUMI (JP)
Application Number:
PCT/JP1995/002506
Publication Date:
June 12, 1997
Filing Date:
December 07, 1995
Export Citation:
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Assignee:
CITIZEN WATCH CO LTD (JP)
MATSUMOTO YOSUKE (JP)
TANOKURA YUKIO (JP)
HAMANO KAZUMI (JP)
International Classes:
C23C14/16; C23C28/00; C23C28/02; C25D3/56; C25D3/50; C25D5/10; C25D7/00; (IPC1-7): C25D5/10; C25D7/00; C25D3/56; C23C14/06
Foreign References:
JPH0570989A1993-03-23
JPH0570990A1993-03-23
JPH0570995A1993-03-23
Other References:
METAL, 64(5), (1994), MICHIYUKI KUME, pages 50-51.
See also references of EP 0808921A4
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