DECORATIVE PART AND PROCESS FOR PRODUCING THE SAME

Title:

DECORATIVE PART AND PROCESS FOR PRODUCING THE SAME

Document Type and Number:

WIPO Patent Application WO/2008/041562

Kind Code:

A1

Abstract:

A decorative part and a process for producing the decorative part. A first nitride layer containing at least one metal selected among hafnium, titanium, and zirconium is formed on the surface of a decorative part comprising a soft base made of a material selected among stainless steel, titanium and titanium alloys, brass, etc., and a second nitride layer containing at least one metal which is selected among hafnium, titanium, and zirconium and is different from that in the first nitride layer is formed on the first nitride layer to thereby form a primer layer. A multilayered hardened layer including a gold alloy layer is further formed as afinish layer on the primer layer. Thus, a golden decorative part having high hardness, high marring resistance, and high corrosion resistance is obtained which neither is marred by impact nor corrodes. Even when the outermost coating layer of the golden decorative part is marred, the mar is less apt to be recognized with the naked eye. The golden decorative part has a golden color tone which is bright and gives a high-grade feeling. It can hence maintain the beautiful appearance of a decorative article over long.

Inventors:

MIYA YUKIO (JP)
NAOI KOICHI (JP)
TANAKA OSAMU (JP)
SHIBUYA YOSHITSUGU (JP)
SATO JUNJI (JP)

Application Number:

PCT/JP2007/068576

Publication Date:

April 10, 2008

Filing Date:

September 25, 2007

Export Citation:

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Assignee:

CITIZEN HOLDINGS CO LTD (JP)
MIYA YUKIO (JP)
NAOI KOICHI (JP)
TANAKA OSAMU (JP)
SHIBUYA YOSHITSUGU (JP)
SATO JUNJI (JP)

International Classes:

B32B9/00; A44C25/00; B32B33/00; C23C14/06

Foreign References:

JP3244952B2	2002-01-07
JP2001294955A	2001-10-26
JPH0711462A	1995-01-13
JP2005119260A	2005-05-12
JP2001301400A	2001-10-31

Other References: