Document Type and Number:
Japanese Patent JPH0579447
Kind Code:
B2
Abstract:
The invention provides a means for solving the difficult problem of the deposition of stain in the recesses to cause loss of beautiful appearance on the matted surface of an article for personal ornament made of titanium, zirconium or an alloy thereof formed by honing or barrel finishing. The method comprises the steps of (a) forming a first matted surface with microscopically fine protrusions and recesses on the article by honing or barrel finishing, (b) forming a hardened layer on the matted surface by nitriding, carbonizing, boriding or oxidizing, (c) partially removing the hardened layer covering the protrusions on the matted surface by a first electrolytic or chemical polishing, (d) forming a second matted surface on the article by honing or barrel finishing, and (e) partially removing the surface layer at the protrusions by a second electrolytic or chemical polishing to smoothen the surface leaving a sandy appearance.
Inventors:
MURATA TOSHIO
KUSHIDA HACHIRO
IRIE KENJI
KUSHIDA HACHIRO
IRIE KENJI
Application Number:
JP21570183A
Publication Date:
November 02, 1993
Filing Date:
November 16, 1983
Export Citation:
Assignee:
CITIZEN WATCH CO LTD
TEKUNO KOGYO KK
TEKUNO KOGYO KK
International Classes:
C25F3/08; B23P9/00; B44F9/10; C23C8/02; C25F3/02; C25F3/04; C25F3/16; C25F3/26; (IPC1-7): B23P9/00; C25F3/04
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